Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04f5939e683642b…

MALICIOUS

PDF

82.5 KB Created: 2021-02-01 21:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7067885617a13f6995c23e8704098d8d SHA-1: 4fa49f24d9d827eff008290d29513c6b5232653e SHA-256: e04f5939e683642bc6e7efd358077786c5c6a32d197d13300d136fb70830336b
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://leonvi.ru/123?utm_term=funnest+game+unblocked PDF link annotation
    • https://cdn.sqhk.co/zuxeromewime/mwjSghg/7425300888.pdfIn PDF document text
    • https://modurofeg.weebly.com/uploads/1/3/4/3/134376635/larozit.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/hggB4ih/56488050820.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/eiaDiis/ikea_furniture_hacks_buzzfeed.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/VihNNhi/89881318566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fd6c31850127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fdc18e4c7593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fe179f23049e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373259/normal_5fedc7d10a679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_6002bd6432bcd.pdfIn PDF document text
    • https://zuparimetusu.weebly.com/uploads/1/3/1/3/131378993/fikex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5ff506e8344b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384050/normal_6001e4d53ce27.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/5064585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_5fe872aa66357.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469824/normal_5fcdc3d070bc6.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/jbNP6ij/50372109901.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/EZhhFd2/child_development_learning_domains.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_off000104ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AD 5320 bytes
SHA-256: b796db46e3e57e971c4f4f1b62b57e351f388e31cfa67af98644ee843742ff84
font_01_sfnt_off000116ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BA 11344 bytes
SHA-256: fbe397df748e05367440e256c0178369da2efc401c5697e2fa1c42a0ddb0527d

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