Malicious PDF — malware analysis report

Static analysis result for SHA-256 929e369e88c69d4e…

MALICIOUS

PDF

88.2 KB Created: 2021-06-29 13:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d64c4650efb68b82adedd12f70ca4322 SHA-1: 8f5e0a693ed610ccf3d775f2afcf13f58789a9c1 SHA-256: 929e369e88c69d4e1dbec88f82bb31de918d6fa78194d336710bc1afcffd3443
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is used to facilitate malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=quick+heads+up+synonym
    • http://www.hussco-steel.com/husscofiles/files/15204295010.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72801f5e6---23406503486.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/085915b5f61cbfb8f6231bf46f0f58b1/molipobugukagigufus.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/gajevodojutugevavuda.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e3e73f646---70911251638.pdf
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/1cc744d66647adc63fbd2de9178c62f4/90413293460.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a137711fc31---19602909891.pdf
    • http://soft-pro.hr/upload/datoteke/61478851602.pdf
    • http://boekenwinkelindex.nl/images/uploads/11117173024.pdf
    • https://acgroupenterprise.com/userfiles/file/65916744963.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/16oe6k1kk7c2jtoe8fp425mvr4/josojezaleronuxolusutel.pdf
    • http://crmrealty360degree.in/userfiles/file/79590295957.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdbb1264f8---didijepelibewadasiniv.pdf
    • http://koovappadyscb.com/ckfinder/userfiles/files/keridupusawug.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c42d29deb4f---94315402130.pdf
    • https://jf-orvalho.pt/userfiles/file/mivawepifoti.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q3vl89a40jk264mj40k9mrpuv5/nekasipemobuwe.pdf
    • http://gursakaryahukuk.com/images/file/kebikeruwegug.pdf
    • http://fouladsazanco.com/Upload/file/megiwufasuveg.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/24c05c1c18505a84532a921a223dbacb/xizezozuwoxelibova.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/cci2u9fshcf3h72ps9gfkrbp64/40409370849.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/dcq8mht7t52h1kec466q58vcus/41168122664.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f919210ae---66328594574.pdf
    • http://futurepoolandspa.com/ckfinder/userfiles/files/36475723308.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50b.bin
794fcba4f090e3121d8880f2b0163dd45996058ecd5f15fa1afaa3ebd6f75504
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 10900 bytes
font_01_sfnt_off00010e30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 16792 bytes
font_02_sfnt_off00012642.bin
c8db896e44f692158b379f67901a9b7580d59c83919390cd54240abf043626dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12642 17528 bytes