Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc1e4b01532f38a…

MALICIOUS

PDF

80.9 KB Created: 2021-07-24 22:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2abc0aadf9255871d0e7201fbef4331a SHA-1: 6e330922aa7807f069524797b2aa514ee0dfc24d SHA-256: bfc1e4b01532f38a6b76c66cdb4964f383baeca2d6b015863722ecdadabfda99
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware. The document body was unreadable, but the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6617f05ca09669d1b03d356a44391fcf/nawoboj.pdf In PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/091524bce1aaf3909139b73eaee294da/xuwazamomi.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/1576cb8c26915d8e50187017a52aefbc/29231462112.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba94acf345e---59352480834.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/86642833596.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/43127425492.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/30373fa41eae9317bf5b822360c506f6/4638286073.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16083476d545d2---85472921455.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/54bad42b16a1575455780508cf986435/94806883270.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607257a8ea789---93424853801.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/84393119686.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfc3074247---napotefatazupuretibeviwi.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a7b7c0939---gidalojej.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/00d8969b76697ed94162fd569243cc72/56869281169.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/41423449609.pdfIn PDF document text
    • http://amandamaitland.com/images/file/96628403864.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/76b9c79e543a8a1066d4a12671959401/21577871159.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/41435050086.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/1938341758.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/933998d774e3b70e00008af35ad15887/79284408872.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2saskqrr4h2girligaguts1mt2/98777781195.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=watch+dance+moms+online+free+123movies+season+2PDF 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_off0000d7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A0 11144 bytes
SHA-256: 31a97e17fdecc3d3c52f31fc08f4ba05d67394405aa63e18304d73e8ff8bf1a5
font_01_sfnt_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 16552 bytes
SHA-256: abe8925098cdcadb6bbe2f201f08cc10d64c0f013730c4b80d6d41bd88bf8359
font_02_sfnt_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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