Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bef6d65f60f84d…

MALICIOUS

PDF

72.8 KB Created: 2021-02-20 22:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8cc7d802638bb8f1e50dcacf6d99d9f6 SHA-1: 90eaaa82f8755e2fad0f9c7f996f57c8b20a00a8 SHA-256: a7bef6d65f60f84d10bcb353c00e51f8e0bcb5c15dddeca3379545e3782ff9ef
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://bologen.ru/aws?utm_term=how+to+turn+armitron+alarm+off PDF link annotation
    • https://cdn.sqhk.co/fuvebopeweb/difjhJU/jetpack_joyride_theme_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404313/normal_5ff05d5ac0044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_5feb1a5ac2e2c.pdfIn PDF document text
    • https://cdn.sqhk.co/pizibimo/4ifhgjb/majemolek.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/gghchby/nasigujaruwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383334/normal_5fee370ce7226.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373526/normal_5fec6bdd36db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_5fd1f815caed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_6026bdf37d0ce.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/jGLoxoP/fiwupi.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/gehaI8T/call_of_duty_modern_warzone_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_6007c38d6e2a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fce6cc02c9ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ff651e85a234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_602d3e27949a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 4788 bytes
SHA-256: 4e93ff8911e0b9f4e5236c7f6568f6cf2981caf37c0becee90ce1cf0abdc43d3
font_01_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 10852 bytes
SHA-256: f41fc9000668f91b1eeb08994312b34efe0f4e0c6863418d9d17705508b20b9b