Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c13497aba73a2ca…

MALICIOUS

PDF

70.3 KB Created: 2021-02-16 09:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5a1906d44c9f0913db46feb78dad358b SHA-1: 32c8509f1e4d58626755586816c217d7e13c5e33 SHA-256: 4c13497aba73a2ca3e7fb6aec54d680bd25219c734e312731a7165eded597ecb
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://bologen.ru/wix?keyword=sleeping+venus+necklace PDF link annotation
    • https://gazekusiparisom.weebly.com/uploads/1/3/4/0/134012522/sakexojot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_600d51903054d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_600f48e4b0898.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ihLhhnE/online_fighting_games_pc_no_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/dShhshd/desiree_s_baby_love_theme.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/jctjhga/american_dad_apocalypse_soon_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_6028b2b6dd840.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/yBjdWO7/mibupaxoramajuj.pdfIn PDF document text
    • http://aarbuz.space/adobe_premiere_2014_kuyhaara6xz.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/c7653b59a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481527/normal_6024be6f95244.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/awbfk0D/fekevikumujeke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_601673874894b.pdfIn PDF document text
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/zobumub-zugaz-lilupotux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_602437ef39802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472185/normal_600a1ee799bc0.pdfIn PDF document text
    • http://podeves.xyz/bizogek87cg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_600f168269318.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 3292 bytes
SHA-256: 1c64bcb45013cddc24040e77d1a85fc939d87d4dac2dd4aa25ebe7afbfa22c90
font_01_sfnt_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5232 bytes
SHA-256: 67382ea44485dadd1b7adaff9ecb5b1d3073bba5ba52310baa824a2b8b71ef91
font_02_sfnt_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 10416 bytes
SHA-256: e2dcbf44b71aa29db760cc167a6f4bd64e7f734ae0199c1853ed9278ad865f73

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