Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf928b285e60adb5…

MALICIOUS

PDF

70.8 KB Created: 2021-02-24 20:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f63b84ec8223a27b720369937f020bdc SHA-1: 88ab9c47d5c96a8f28585a7a34791be9f259ab1c SHA-256: cf928b285e60adb5c92931ca851cae1a4886daede29dfb5dd62b29716ae768b4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=how+to+set+up+ge+oven+clock PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388065/normal_6031265152761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_6023f22d04806.pdfIn PDF document text
    • http://xviiivbgz.com/the_train_from_hatey0df6.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/planet_fitness_pf_black_card_worth_it.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476954/normal_602d792be2e95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382631/normal_5ffa31718112d.pdfIn PDF document text
    • http://roflan.site/lowe_s_department_store_closest_to_memt72m.pdfIn PDF document text
    • http://voiprormul.xyz/bipaxodelamuzetizijewulivnxiy1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jalameki.epizy.com/aetna_medical_claim_appeal_form.pdfIn PDF document text
    • http://walazej.rf.gd/how_do_you_turn_the_alarm_off_on_a_casio_f_91w.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/virederevagenotilegupumef.pdfIn PDF document text
    • http://wefofumerari.rf.gd/24906918022.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/paxogazomisasofafojajeno.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/93654939002.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/43890298806.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_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 4972 bytes
SHA-256: 319158bbc18b5a82ad07a1faa54cc064fe17ee1669dc81022335e0b82087058e
font_01_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 10384 bytes
SHA-256: eaf0bf0165f387648927069127dbeac520bd431a3f9f1c983b2e351b1e914c4e