Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaaa5302d0d1acd…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 01:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 66bc5f7e2627f0d16582ffb34d11bc12 SHA-1: 151304e9f79ff4e5ad7d22c79409c8e8cea61278 SHA-256: bbaaa5302d0d1acd511a52099274f173b7d506df8af9f837820ff4a3e9b2f323
196 Risk Score

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 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://pelibifir.ru/award?keyword=dyson+dc41+troubleshooting+no+suction PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fff7f6e2b6dc.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/cJhbUgd/pizakoritepuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_601a19bf0a6cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6034f194295e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_5fc68146f36f1.pdfIn PDF document text
    • https://vitekasawo.weebly.com/uploads/1/3/4/4/134456264/zoxozividipa.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/gHmi3JR/one_night_ultimate_werewolf_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/o39Ihfv/22978493236.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/hbJhhCs/14703544900.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/LMEgjmL/bikalumamimisojefakunam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460048/normal_5fc8d09088282.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/ggigib7/kerez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5fdbec7566a2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/what_to_write_in_a_baptism_card_to_godparents.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_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 5372 bytes
SHA-256: 13d8d91d5e372f1f8e205b2c6ad35d050f934d2cc5359fd11054c57dcac26d61
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 10128 bytes
SHA-256: 07ade5eb6f8c454bff517a0f79826ef5a76a5cecfb5ff84a7f7c81d4390e686d