Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0133768fb24aa4…

MALICIOUS

PDF

86.8 KB Created: 2021-06-25 15:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1927746e2be6484d5ef3ed751dbf4ea9 SHA-1: e1b04c68b8ec57f90f1e46f662f471fde59a0412 SHA-256: 0b0133768fb24aa4c0e06e4db8b1615bcd91fe49c956f6295de75e2bcd58b183
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised or disposable domains, likely to facilitate phishing or malware distribution. The presence of a 'gta v free game download' lure suggests a social engineering tactic to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://poolpoint.be/uploads/file/7281879847.pdf In PDF document text
    • http://beiwendq.com/userfiles/file/78436175587.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/xedoferuzitimovera.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160891e80c3b52---42750000379.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a1000202890d54388fb13c1487301b69/faradejofi.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/zabumaziredakojubi.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/mudapugabisujotejerum.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/wewuwikaken.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/475494b1bd854f831322441044dcadb1/15190862951.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/dujomalu.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/mau0hkenidka9ua6lfp8p8jop6/sudakitokidemawugurudos.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6d962dca9---76309540926.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/61590661287.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160be0df085814---13351026734.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/95815797366.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/9858c5e8c63a0870ce42ab63318eae0a/zoxivebovawawife.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071eeec18f35---91163042953.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/24fbd33a0e6727bdf67957ce2eb14779/zifirasaxakazolesipiguj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gta+v+free+game+download+for+androidPDF 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_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 10720 bytes
SHA-256: 4ff88cdb7915d5fd6fa12c871630dc511e2d2b3a6b1088d372872f750ca4a304
font_02_sfnt_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 30004 bytes
SHA-256: 4e8bfffbcf6d6f0eb3fc0680498169264053e95d58b7f9d4c02880128dfe9bde