Malicious PDF — malware analysis report

Static analysis result for SHA-256 32176d9b29bd7f2d…

MALICIOUS

PDF

169.2 KB Created: 2021-08-12 09:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 78c3d1ba1f68d73bdc49872f3b126d79 SHA-1: cbd6063d804b6a236344e4ff3ac84fe10879f410 SHA-256: 32176d9b29bd7f2d146b0b8728b62f14f0ef1a53bd02e653b7125b2c1792761f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a lure to install a browser extension or update, a common social-engineering tactic for malware installation. It also hosts numerous links on compromised WordPress sites, suggesting a distribution network for malicious files. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=cisco+anyconnect+secure+mobility+client+mac+4.9 PDF link annotation
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/26001e248d2de4734d19fc52d14ac56b/36858136357.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/161090cd341c70---mudedakojesewezaza.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/18201593371.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b219286b76f---5911177039.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/vodow.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/mugufom.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/86978702742.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/19791e2b408639171ea45594062af333/59339554594.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f41d85e851f---fenowosozekuxo.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5305a1e06c---jefonozilurakifidojaxek.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/58985638259.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc55db4f5e---64903914228.pdfIn PDF document text
    • https://clickbox.ro/images/file/buremagabefexozejenijaxon.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082af585ad85---xaloj.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/gexabofoxogapominageni.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e02ee550a75---64287952681.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/aa1e09980961d609661c24e56966d442/digigavagelipukixotaku.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/786619029.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/bidipaxumem.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/f54f6de97fa45cb27b0b9ac524c5bda7/zilevuwolo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c35521ceb4---zisufebepivu.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4370791f1bfadc8786bde546ecce8bd0/268925416.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/70bd91e9ff7122c44cdeb0102a9f3bce/faximigabozovumotimeke.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160845f76438e6---43689065375.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa945a30e64---vinugogesadi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A97 11088 bytes
SHA-256: 794873d1c51e1cf3ed73ac9fb5f4870a0aea81d715071ef2edad77b0d1035370
font_01_sfnt_off00022492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22492 18536 bytes
SHA-256: c62b243669f2db3977b8b4532d1fe58e4c1dc93ca9252c4454246219600b10da
font_02_sfnt_off0002552e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2552E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00026d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D3C 13320 bytes
SHA-256: e0a60bced6102ec7452227ae040021d58b48f329941cd76f435a9fcf98b7e6f9

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