Malicious PDF — malware analysis report

Static analysis result for SHA-256 326c3047e6ce7268…

MALICIOUS

PDF

78.0 KB Created: 2021-06-05 06:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aa6c3b1dd0bc1caa5e1568ae74779f1 SHA-1: 9cd28002e82f254e237fea9117830f218f5bdb41 SHA-256: 326c3047e6ce72687e6a5dd9f6e45961ddd1bbe6fd55f90d0f96eb41ac8d4bdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. One prominent URL, 'https://queure.ru/pbw?utm_term=joe+manganiello+evolution+pdf+free+download', is directly embedded and flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/pbw?utm_term=joe+manganiello+evolution+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5fd8e86929214.pdf
    • https://cdn-cms.f-static.net/uploads/4491155/normal_60179f5e84d4e.pdf
    • https://static.s123-cdn-static.com/uploads/4371806/normal_5fc959a802e1a.pdf
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/478130300d1e.pdf
    • https://cdn-cms.f-static.net/uploads/4446636/normal_602d6c0d28e12.pdf
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fc5b0f0f388d.pdf
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5fe4dc3f56edc.pdf
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/zokozolopozuje.pdf
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/fifavav-boxiga.pdf
    • https://static.s123-cdn-static.com/uploads/4379844/normal_60008e979a374.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c64b286d-df7a-40eb-bb2d-adce62cb30f6/61903915991.pdf
    • https://uploads.strikinglycdn.com/files/3ab64d00-60e2-4be3-94b7-4d5e4df2d824/13062494750.pdf
    • http://foziwedugumu.pbworks.com/w/file/fetch/144433857/criminal_law_cases_and_materials_8th_edition.pdf
    • http://kufujibumufa.pbworks.com/w/file/fetch/144588186/8630149995.pdf
    • https://uploads.strikinglycdn.com/files/83ecacfb-ed4f-4a53-8dcb-c26ca4d89367/momejazej.pdf
    • https://uploads.strikinglycdn.com/files/d936ba4a-6cf6-402d-b6ce-1c93e88b6122/tafiwedubijusoxukexatez.pdf
    • https://uploads.strikinglycdn.com/files/f1dd1aa8-6fe6-4736-8b66-db95412bb79f/ravanupisimapipa.pdf
    • http://zilebunod.pbworks.com/f/how_to_attach_swiffer_wet_jet_pads.pdf
    • http://wasazejis.pbworks.com/f/jewuxazerosubar.pdf
    • https://uploads.strikinglycdn.com/files/8eddc92d-84f6-4177-b7f9-69533ef34132/juwosufowubud.pdf
    • https://uploads.strikinglycdn.com/files/cab049f3-4fb1-4bd7-8c7f-8092e55efbe4/car_sales_agreement_template_word.pdf
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144469416/15279240704.pdf
    • https://uploads.strikinglycdn.com/files/a7c16ecc-c3d8-4a2b-8820-994c97ddeda6/5014996297.pdf
    • https://uploads.strikinglycdn.com/files/49263d5b-9a7f-47c9-9899-b9bbcdcce414/how_to_start_bosch_super_silence_plus_42_dba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a6.bin
706f5265e0528fcadc5d3b23d586e0ffd4ee18bc6efb070a4e3dd4651b22f678
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 5324 bytes
font_01_sfnt_off000102c6.bin
4e472802d477c22cfddc8b60fc9a131cd07fc25499e987d5b9c09afc8eaa9eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 11652 bytes