Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d008ca3b03a930…

MALICIOUS

PDF

120.0 KB Created: 2021-08-02 23:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: a64e22b04f34738b4db96ba1d1ca09b1 SHA-1: edc558c205854f0431843a7444d7ce88ddee6be0 SHA-256: 48d008ca3b03a930c33dbce3dbd63e53e99299d57b74b69f1ed4a1a2a3e5b1e9
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dianthusindustrial.com/resimler/files/88474497339.pdf In PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/0aff2ef1848352fc2dbedb5c70ede200/pewudadadusini.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb50ab7f5a1---tegabigovob.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/m6f2lp3skdiehugmr2f7f721ls/57079224132.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3f5b6e76d1430955d5825e2dd2cd5274/10244728563.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/56597847675.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/69758781736.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2ribmab4v2gtkv7h0dknhu6kb3/pulitolesizekidag.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/6873b328652b2f58d6f59bf53ef64e6d/79550935359.pdfIn PDF document text
    • http://ruihuitax.com/files/file/vixopediwixogumarulepugol.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/nawemabokekovuwinebedumog.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/dca762dc37dfaf31004df4f37f2473bd/zomusebowewidorisi.pdfIn PDF document text
    • https://samowar.ch/upload/file/ropojojew.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/c5dd58ggcqlodu8v9i8i8fe757/tifufukizezogoposesinu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798b13a9351---refowovi.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/80294901724.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/b77a7a29a0ba80b2369d88e8f79820d4/nesaxalejexebiw.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/xefukot.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//juloretibonopagoxedasaxi.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0d8cba34fefa7b07b3b13c07da510f8a/piponatubun.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b20c0fcd7fa485818f1eabe6a99852d7/72505457577.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3f3c098f0dfde877d290321a1ffd5e6b/botawasavuwup.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16090f9ffd6d56---zosatabesetege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=commando+hindi+full+movie+2013+free+download+in+hd+720pPDF link annotation
    • 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_off00016f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F84 11296 bytes
SHA-256: 0434346fe996a8ffe9c83b3da7f54866a286e018ddfa82f98f557c9a84aeef43
font_01_sfnt_off00018a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A04 17972 bytes
SHA-256: 58261b0e7cbc28e57878c98f959ea42c591d7bbf397983f8ad518c404f796dad
font_02_sfnt_off0001b97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1