Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7254caca91d7fbc…

MALICIOUS

PDF

69.4 KB Created: 2021-02-21 20:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ed6024a8463ba674f53a1c00a82292d9 SHA-1: 6531e94f3c6efcb6e534a8bd3041ca914f0abeac SHA-256: b7254caca91d7fbc9f60caabbae8ae90198bc9cb761be10919ec08f816b32889
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/123?utm_term=nutrition+facts+arby%2527s+roast+beef+no+bun PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5ff14b2772fc8.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/ial4hf0/police_helicopter_simulator_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_5feb46fb43457.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/hjEichd/instagram_captions_for_girls_smile.pdfIn PDF document text
    • http://pmaider.com/xebupifatopeged7xc3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fcb555157f34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5fcef69a6c46f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_60203e61b510a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_5fd6af842831d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_60199899d8c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6020c1d0cf094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5fe5c65855a88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5ffa830f40ca6.pdfIn PDF document text
    • https://cdn.sqhk.co/sigagegijej/jTWgiz2/77922253612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/classifying_polynomials_in_standard_form.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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 5088 bytes
SHA-256: 3625c6dc9e91fa49a16d688566b57ebdca4a6f6c97917c4a42b7d319372e6871
font_01_sfnt_off0000e608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE608 10252 bytes
SHA-256: 3b2f565f5725ceabb0ae2f7bb31ccfda783ce2d3f1153d51de9dce8880c417de