Malicious PDF — malware analysis report

Static analysis result for SHA-256 1994d5183e0cb4f6…

MALICIOUS

PDF

78.6 KB Created: 2021-07-15 17:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 26278726565375255d10dfc9baee2922 SHA-1: 97a79116095c15b5aa8847061313afca95c4c9bc SHA-256: 1994d5183e0cb4f69c251ebb5640ae0abcebe00291ae942090bf6d3f54c0866a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting, likely intended to redirect users to phishing pages or download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=take+me+to+the+river+chords+and+lyrics PDF link annotation
    • http://bluecreator.biz/ckfinder/userfiles/files/17006063151.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/17cf7fa156391349f7f0d80c334e9602/36284576944.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/905bdffadc27c431a58889edf22c3e31/46149121967.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/427ce24cd77c8e4931bf1138e9bf7a6a/72193544488.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/77714568090.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/q7fv527n4iak3e2ph0ic7ppsc2/webebilukep.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/52244924821.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8af498e745581e70f1284041fd56c73f/sutavavevuzexoboronutab.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa910889387---33045512148.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/jofikogogan.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///gejurimibojonak.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/kvmgmfbdbrdnhhh1gecea0spu4/paxakem.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/95241357974.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/58a8f36eb1b640b2e44dd084b192b1d9/96734641862.pdfIn PDF document text
    • http://prestopc.it/upload/file/26183110240.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/34220087279.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/wogijejagapulitazatake.pdfIn PDF document text
    • http://primaneighbors.com/userimages/fipila.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/4239500820.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe85233875---25682862226.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/lafuvufubupolivikexaxoka.pdfIn PDF document text
    • http://tcihk.com/userfiles/vomusaruvizemalaviga.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b561c256d9b1511824540e54c68059b5/nunepomotorodum.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/87340111474.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF43 17260 bytes
SHA-256: 77b7bd3391185059eff38cbcc1e92455228ade88e7a011c27791a0e915f1fb9b
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 10868 bytes
SHA-256: 2350557a4b3d341b8eaf40a3aa1bf138c97305b13e5c02f477af3a914889e623

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