Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0b9c0ce4c4565f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-21 08:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 22662d62e53245c81075d042aae0fe9a SHA-1: c119f1ccf0de310de561fd0772df15cf6aea4b6b SHA-256: 8e0b9c0ce4c4565ffa692feb80ab98819507e80559f269d8fd3d2a9bb40bc7ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to external domains, many of which appear to be part of a link farm on disposable hosting. The primary function seems to be redirecting users to potentially harmful websites, consistent with phishing or malware distribution tactics. No scripts were extracted, but the PDF structure and embedded URIs strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=vr+apps+for+android PDF link annotation
    • http://everintelconsulting.com/upload/file/202109160957000670.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/selifawavobobufif.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/69336003342.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/50242265724.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/novodaze.pdfIn PDF document text
    • http://catwalkexotique.com/userfiles/35173181658.pdfIn PDF document text
    • http://micruts.org/userfiles/file/92509143896.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0860cc5f---pamiminiberivo.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02682cee4---56443901201.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210906115151.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/wigadugotaraziburo.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/33111458294.pdfIn PDF document text
    • http://potlista.com/file/files/71078953170.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///gimuwi.pdfIn PDF document text
    • http://lemma-studio.pl/userfiles/file/jezajipaxidudom.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/witut.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/limulegivaberisokitepazib.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/84849764098.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210916113248_29702647.pdfIn PDF document text
    • http://cib.lin1.ca/phpsites/vertical_living/uploads/file/37558350117.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/7980087473.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/mogifenopelusekalopeba.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/vegozawivumiwolakifivuxul.pdfIn PDF document text
    • 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_off0000ee4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 17424 bytes
SHA-256: b263bf639159227a3832b97b1d629a66ed95b6410da83c041dca8565521f4ba5
font_02_sfnt_off00013350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13350 10184 bytes
SHA-256: e15cccc6eb66479c3d41133e5d9a674159b3df74e0fe50c468de85ba33728a6c

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