Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1539141e9b8d582…

MALICIOUS

PDF

72.3 KB Created: 2021-02-18 11:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8e0d30bbd35c6c81c89716318acab8cb SHA-1: 053bc5b60303f44c09afb054c4886c3e2df27bcd SHA-256: b1539141e9b8d58297e350b597f927d001cfece7ff38b4f9bf79088c6caedf91
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://seumenha.ru/123?utm_term=annie+play+script+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376362/normal_600d36f44caf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_601ca1ce5eecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_602ddf02de77b.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/Vjgiahi/civil_war_generals_as_muppets.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/5gfRdf4/zombie_combat_simulator_pc.pdfIn PDF document text
    • http://vozaxakinexu.iblogger.org/animated_instagram_stories_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/IlShb8g/accuradio_jazz_without_vocals.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dvbjhTP/2867094236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_601e785992ebe.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/wovedukevikov/bixoba.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/80864069505.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/cell_phone_jammer_circuit_project.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/zegokupewarilifovovobazog.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/bootstrap_responsive_templates_free_w3schools.pdfIn PDF document text
    • http://javoxowixeb.rf.gd/hotel_california_lyrics_sheet_music.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_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 5220 bytes
SHA-256: b06013d38be42e5b705d05efea1f66db280baf2d643aa3d65075b40389d2b1de
font_01_sfnt_off0000f222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF222 10136 bytes
SHA-256: 41f4c65f279347f1735acaacfc8cde1df771df6bca6b5f6f104262d6b402ce44