Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8bf7f3fa80c554…

MALICIOUS

PDF

88.9 KB Created: 2021-08-03 18:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1130b6e59b7f2e0cbb51be07fbbf95c SHA-1: eeb011dc52c6c3e8d20f73a32909929cefe5d950 SHA-256: 4c8bf7f3fa80c554582c01246b7fa3069ecc6a4eff7534d2178e4455a97ed761
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting. The presence of these links suggests the document's primary purpose is to redirect users to external, potentially malicious websites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/66984bb060829d8251cda6406acd2b51/41577528616.pdf In PDF document text
    • http://abwlargo.com/uploads/files/fasaposejefuwega.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/3aa53c64f3840ebcb392c1bfd23b94aa/vimetewanupokaxumumulo.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e35051e3e04---76603345251.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcd183129---widemalisufokedozisif.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/a04fb0607662ec52e881b17107a958de/bejezuxudokuvovivuwejufiv.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/25660028481.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/duzituf.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e510aad65e---jipasasi.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9592e6eced1dc0682d034d68a054cfc4/puvozerar.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/34819448511.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ea87ae7cc---83345819341.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b5ed76c93---nowipitageturuvajisivus.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3b89e7f98fbbe90a1592d6fd2fa5a6f0/dopegaruputupumewinulu.pdfIn PDF document text
    • http://goref.ru/files/file/sobanula.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/355dcae038f74a800a9a6c10b35c9ac9/27270806320.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/gquu28e73t5iuqmp99lehtme5p/94485323546.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72385de67---72417965267.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/82194519696.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/funoretipapolawulazavipe.pdfIn PDF document text
    • https://bnovum.hu/downloads/50428810279.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/fukov.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/97927502847.pdfIn PDF document text
    • https://schmitz.cz/res/file/xazofoguvekolevumufitinul.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1bfbbac9748d7a5574cfdd89503bd20a/79114730059.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=carrier+weathermaker+8000+parts+listPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 10832 bytes
SHA-256: e0c89720c98ebde4730d0c6fd13bf97e3307ff6b2ceb120aeeb38021f9411f8c
font_02_sfnt_off00011012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11012 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_03_sfnt_off0001252e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252E 17984 bytes
SHA-256: e37fc3b0c263dc361821112aa82656eb9529427ce65f0ba9ff0c2e39914efb7f

Open this report in the interactive analyzer, or submit your own file for analysis.