Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01d2af557949a8d…

MALICIOUS

PDF

67.9 KB Created: 2021-02-26 20:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 32bc4d17861f39b7b8b71f6947630f54 SHA-1: 1424a07f6efbacc4031226a82ec996a185c7cfa1 SHA-256: b01d2af557949a8d79a1b54e1df3fa3c23fe878d4ea5c03f030d2fbdebe420b7
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://nipisod.ru/award?keyword=how+to+download+codecs PDF link annotation
    • https://wuselusovofose.weebly.com/uploads/1/3/1/1/131164562/23255.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/zinitodarenuw-kizavo-xazifuvakesezap-fujaturikin.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/hhjrgcz/67549798065.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/2422925.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/ha7YpqC/stick_war_2_online_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fe43030a3b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6014bab775a45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389581/normal_5ff4ec519c224.pdfIn PDF document text
    • https://mezamavizasiv.weebly.com/uploads/1/3/5/3/135312133/143035.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/d7yhQcR/civil_war_1864_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/gvgjNLW/kodebudimuzugatiruloxuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagonunanu.epizy.com/87502839968.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/23276805001.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/55217314910.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/1614465777.pdfIn PDF document text
    • http://bupomejov.epizy.com/wazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/3693169836.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/dubef.pdfIn PDF document text
    • http://velirogajebabe.epizy.com/24436320569.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_off0000cee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE8 4892 bytes
SHA-256: 215222cf817f50182c64440092433ac4eb27a233f142e3c3faa2bcea24a5ae62
font_01_sfnt_off0000dfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAD 10428 bytes
SHA-256: 825c99f1272adc9ed38cb930c4ee562185d5c847da6aecb1b196296cc301840a

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