Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c8e5a10108f55a…

MALICIOUS

PDF

72.6 KB Created: 2021-09-12 02:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9de3bed5c4eb6333b47829d6b5409962 SHA-1: ee31932401484ba2f001c93eef0cb691c61c71f1 SHA-256: 69c8e5a10108f55abebc93cf06716b5ee2ec3247463f987d4e0e344d8636d34b
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to PDF files hosted on potentially compromised WordPress sites or disposable domains. The 'Browser extension / update installation lure' heuristic strongly suggests a social engineering tactic to prompt the user to install malicious software or provide credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 9

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=shaadi+mein+zaroor+aana+full+movie+putlocker PDF link annotation
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a88168ba67---105470296.pdfIn PDF document text
    • https://moolans.com/uploads/files/xexumukad.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/sebivimatexag.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/jarugaxubotuxofi.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/nojudonafa.pdfIn PDF document text
    • https://onlinendttraining.com/files/18740765686.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/62451773511.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/90231950635.pdfIn PDF document text
    • http://megalaserasia.com/upload///84925949584.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/kixugitubanijijitanuve.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/52ab55bd453830d570ade51ff8ec545a/3242411536.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/78965158083.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6bf82492d10fc5abfd3b9ce8327fcbda/67513293147.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xafolebigifowa.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a87f1e4e9474f7378eb73060fc362871/weziba.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/87639059231.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/bijirimefusifaxe.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/joloxuzekekamigujoto.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/wokuzuzulalubomafimasove.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/nimofeninavikitapik.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/8796323771.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AB 17124 bytes
SHA-256: 7d114637d9814158d3e0d4fbe7b1527b44319f4a07c434c892bc136b8b23ed89
font_01_sfnt_off0000e360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 11108 bytes
SHA-256: 1c42fcff4a5440bc1833d922e8905acb423ff72471d1153efe22d1b2e39bc2a1
font_02_sfnt_off0000fd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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