Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1db92f6b10fbe70…

MALICIOUS

PDF

66.4 KB Created: 2021-02-19 23:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0d9674c7f067721e57b5e0ae772ce39f SHA-1: 373a7beb364203ef34967dbf5617ee7119f0777f SHA-256: b1db92f6b10fbe70e79b68e3b235073a4522c0147b827e55e8ee0a3d2bc9b15b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=warrior+cats+dawn+of+the+clans+quiz PDF link annotation
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/590e6d7a.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/Ujcgjaz/cyber_fighters_legends_of_shadow_battle_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fd330ea55d7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393486/normal_602e3e9e0f762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_601fedba85f0e.pdfIn PDF document text
    • https://gepemizuwawufak.weebly.com/uploads/1/3/4/3/134335313/turuvikusizebas-jujuvifevef-musoxalawabepit-fibuwos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_60069ea2d96dd.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/mjjsWWs/n64_emulator_project64_plugins.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5fef7100b9f14.pdfIn PDF document text
    • https://naxufagu.weebly.com/uploads/1/3/4/7/134713872/dowofenob.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/wukevirenesu/naija_worship_songs_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/nejevejov.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/21511231877.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/aspersor_manual_de_agua.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_off0000c7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DA 5388 bytes
SHA-256: 4b3a7ebb4ef3e9d6d1751478d844b1c7b5403e5ca06b77de09daa156228cd7d6
font_01_sfnt_off0000da47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 10140 bytes
SHA-256: 7730589e859f5435ede54be124761db338e92000b87b2e81ebb57e6a0d2b26aa