Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e267f95536e7495…

MALICIOUS

PDF

95.2 KB Created: 2021-03-25 08:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7306573a7e716d3ee5a0e5901695e5b8 SHA-1: defb85bb4c6a45035d89d8b6ce96cc4e38a0a233 SHA-256: 3e267f95536e7495ec299b04c39f0271c9511a32c63f94144637a008a1f5fbf7
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm of external PDFs, with the primary redirector URL being https://vilenefex.ru/award?keyword=bowflex+max+trainer+m7+manual+pdf. This suggests the document is designed to lead users to a collection of potentially malicious or phishing-related content, masquerading as a manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/award?keyword=bowflex+max+trainer+m7+manual+pdf PDF link annotation
    • http://on24-system.club/31842928772uxu4r.pdfIn PDF document text
    • http://2020coupons.info/irobot_roomba_860_vacuum_reviewkamjc.pdfIn PDF document text
    • http://sokesiket.22web.org/cossacks_3_achievement_guide.pdfIn PDF document text
    • http://save50.pro/m-audio_fast_track_pro_audio__midi_interfacet5jac.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/synonyms_antonyms_homophones.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/do_samsung_tvs_have_airplayskgl6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_ab8b37779e4b4b5894e61941e45f7009.pdf?index=trueIn PDF document text
    • http://sigadoba.epizy.com/zalogixixejituf.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/47015827208.pdfIn PDF document text
    • http://rekutuvogunavur.rf.gd/fluid_restriction_guidelines_for_dialysis_patients.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_2093c9e59d464fce8e637115ee954a81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/xusivoxalevugole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0f11a2-c94f-4f78-8be9-0f620c63ead6/80201645949.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/sologojobopuladuzunanif.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/fatukokapede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f880e4f-e995-4741-a75f-8a39e1ce5a2e/lemony_snickets_a_series_of_unfortunate_events_movie_ending.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_b8f1ae7dce714b848044434a5d2d61dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/are_ford_rangers_reliable.pdfIn PDF document text
    • http://derajovaku.rf.gd/54179578646.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311B 5300 bytes
SHA-256: ce8fa8a72f3f7ac76df8679964cdaa0fa208503f5f90787cbd1cd8e4c26dc541
font_01_sfnt_off0001432a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432A 12936 bytes
SHA-256: 3f5a9aede12e5dbddb5d373fbc8439ed75229b9d21d6c98c0fe77733756884ee