Malicious PDF — malware analysis report

Static analysis result for SHA-256 841446fd33c3149c…

MALICIOUS

PDF

73.4 KB Created: 2021-02-13 00:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fe06d88e32fdb43a2d79e6e5515f1aef SHA-1: adb868a737d23d21832f45c92ce54d20e305b660 SHA-256: 841446fd33c3149cdcfcffd4422af6ebe8d9e3d7bee985636327deb537284aee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=carrie%20underwood%20american%20idol%20heart%20performance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445114/normal_601340531869b.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/digexowoluwawekilema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449012/normal_5ff65c3932451.pdfIn PDF document text
    • https://xalokelunubame.weebly.com/uploads/1/3/1/1/131163690/jafejiwu-zemevebapigope-rupowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5ff0e8cf41052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5fd378967ce20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_60195806a81f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_601130a666d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd096e68fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_60159bffef092.pdfIn PDF document text
    • http://lorenbayi.com/famille_de_mots_cm1n3hbo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410717/normal_5fffa77508f2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_6019cb8f5bc42.pdfIn PDF document text
    • http://urro-hu.com/nfc_14-_100y1cj8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fd39370c7474.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_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 5212 bytes
SHA-256: 444bccd1c1b85a0fbfbac422587032c301985c39db615d1819eba99edc66d8f2
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 11564 bytes
SHA-256: 4fc184efa54abf67126ffb62ce7374c7f2fe170d45be5c17c42d415f03ce609e

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