Malicious PDF — malware analysis report

Static analysis result for SHA-256 651fc0b93b79121b…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 18:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caa33c9b8df34dcfe0ac758297272276 SHA-1: 5e9d5ecbcffd50149adf0a666dc8297a03d26872 SHA-256: 651fc0b93b79121bcd88de20f391c70ab115cd0954bb1b975d1c36457aa70bf8
146 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, with one identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, some on disposable hosting, suggests a link farm or redirection mechanism to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/strik?utm_term=sennheiser+ew100+g2+parts
    • http://ig-verifiedsbadge.com/gopro_hero_3_portable_chargerr59cc.pdf
    • http://heartcenteredequestrian.com/beat_saber_multiplayer_guide3aamr.pdf
    • http://alifan.store/48969790703c0tsu.pdf
    • http://roflan.site/885468295141ak6m.pdf
    • http://xomaweluk.22web.org/garand_serial_number_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4385204/normal_5ffe0a0251506.pdf
    • http://weraka.online/wuxajatosulkyvyg.pdf
    • http://help-service-support.com/pevixuxugulobutojepaa1bhv.pdf
    • http://edevletorg.com/pisuxp6zxy.pdf
    • http://misstourist.info/how_to_see_the_whole_dataframe_in_python2pej7.pdf
    • http://dfds.in/actaeon_was_punished_by_artemis_because7lzv2.pdf
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc745a6bd746.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_788808278d404b1dbd18f548e6e74414.pdf?index=true
    • http://bitiwumit.rf.gd/42839266692.pdf
    • http://gaxomin.rf.gd/kutewolalivelapinusam.pdf
    • http://sidalep.rf.gd/how_much_does_a_part_time_job_at_starbucks_pay.pdf
    • http://wuluzakasuw.epizy.com/47947764444.pdf
    • http://juwesuzibu.epizy.com/3d_converter_for_autodesk_navisworks.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_f459a74e36ee44cd97cc04ba9c3fab41.pdf?index=true
    • http://mimegovo.epizy.com/imperialism_in_latin_america_answers.pdf
    • http://wijabotivov.epizy.com/dakixanegiril.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e473.bin
3f928fc4973c00f8c6022a78c45a5a5e96570fae99b3c5097496a1914a7ed34f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5572 bytes
font_01_sfnt_off0000f77d.bin
5d2cff6436d86a49baaaa2b9afb3b18811c634d3a5d79aba61d5aff48da23947		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF77D 11868 bytes

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