Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd022b031eafdb0a…

MALICIOUS

PDF

74.3 KB Created: 2021-05-06 23:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 830c8d8b3acce80e6cc121840ad94a92 SHA-1: 7dbd9d41e50025465df2544a25526923b4b2d510 SHA-256: bd022b031eafdb0a011cfbf0df37e91faaa1f34f42aa5fcd9561dfd1e26ab136
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS upload directories and disposable hosting, suggesting it is part of a link farm designed to distribute malware or facilitate phishing. The document body, though heavily obfuscated, appears to be a lure related to 'Elections Canada registration form', aiming to trick users into interacting with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 http://apcmagon.com/userfiles/97815860457.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d0868d576d15a748a3e6a63834eff4e6/74924837011.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608792ad55157---sonodipemabozasinow.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/828efd124b1f79fc8bd4eae3c2be32bb/jutipuvibogiwodab.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2dff0badc---jipapibuxu.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072e13082fd2---zujolevekawarijijo.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/078ff51a46aebec85a0939e1d693e12c/60593675682.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071b434ecb93---77621946908.pdfIn PDF document text
    • http://allycatering.com/userfiles/63750433904.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609449ad4701f---musofefenumagu.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/lifafurili.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc350e5be---voxite.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608befda748ad---26707519341.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a92cafc7180c6f9809d8e7f2ee2a1ab2/rilapibidodibibakowop.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/a49c687aed5ceb929862e373ddf57e57/dubigubirikadejenimopu.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/79ffa44adacbe8e6bddecf54124cd629/13678672635.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/297e93fa40a09af7c8b3c65dc157f15c/58016775387.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a9198b48---66161423828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=elections+canada+registration+formPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 5296 bytes
SHA-256: fcb5884825779dbb1f7fa4995f8ae14d1168de8774d8a7f1c5e03259f0c7407e
font_01_sfnt_off0000f8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 10536 bytes
SHA-256: 0ff3d9c3c1dc3f3849f8353f57d64a6a681eec632b9d36efe5846b1bed7795b5

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