Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc1c238cb23eee7…

MALICIOUS

PDF

69.9 KB Created: 2021-10-03 23:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e34e2998f66f5ba4a608b677b7ff17a2 SHA-1: e7fd6e153956903647636f85fc1f482ef6de03e3 SHA-256: 0fc1c238cb23eee74132f51ac51f6d3fa3302c11b7a76c8e5f8abf24d09766b4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one pointing to a raw IP address, and is described as a link farm on disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=the+wharf+mille+lacs PDF link annotation
    • http://tccsrl.org/userfiles/files/55625894253.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16327302318139.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/43296899642.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/semuxa.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/nofinovegirujatokaloxulek.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/96514753740.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210912035612.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/18893509849.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/080303108375.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/33074362699.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/6434870203.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/88023644915.pdfIn PDF document text
    • http://agrion.org/upload/fichier/takevonezepozur.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/23180046174.pdfIn PDF document text
    • https://temporar.mirceaseminee.ro/printuri-fi/files/58334715311.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/muxudekafotamewaza.pdfIn PDF document text
    • http://chromavials.com/d/files/55096929104.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614438cb5da66---bosujetesibotapod.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/dasuxifiwimimixax.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/3e1436ee9360f2c24871ec4dc29ff194/mofagifetajixot.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/5449437938.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161315453be9b8---35002101114.pdfPDF link annotation
    • http://aviafond.ru/userfiles/file/velepujonalodegekepexenek.pdfIn PDF document text
    • https://nevisnews.com/userfiles/9252339822.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_off0000b1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FA 15868 bytes
SHA-256: 03084ade47242aec236845c523a452a082e259bd20a4f876c41e35551bd5f620
font_01_sfnt_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 10328 bytes
SHA-256: 834fc28eef6f1f977d94847f5842c81621cf22b4e1135f2673367d87178276bd