Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3b032c0d94785d…

MALICIOUS

PDF

115.6 KB Created: 2021-06-27 21:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1ff12930c98deb0f951ee34b67caa8b3 SHA-1: 437ed69b260abe2d984d72c10767f151509bb0d1 SHA-256: 6c3b032c0d94785d130ed1db4f9c59f8272d1232af3ce6bf297238589a207f18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to malicious content or phishing pages. The presence of external URIs and link farm characteristics strongly suggests a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://cructi.ru/uplcv?utm_term=sexual+abstinence+in+marriage PDF link annotation
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607841316677a---89583660.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052407414273499.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/74035195312.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/laruvizosesepogat.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/98ed0c4a29e082f695ee0b8be1f63c11/takunawudidexu.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/4fd16f6546416aed684ecbacc4c68772/wajomosefaje.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabad5774e9---jewasoto.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/12he5qmgijcltvteq01inckj55/runap.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/79951249461.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/576fe05055c2d26ce6cd6478426223e4/sorapitorakakafe.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/35328133040.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/xibibofido.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc478dae897---90421492300.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b007d5d372---pasegagenivurudon.pdfIn PDF document text
    • http://www.emailposte.com/pictures/63169979131.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/93426b0a8dde2fbe51728be5fb62b8d2/fosuwujaru.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/gufasujo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4327b0831---wefakijirixorufukisib.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa9ba7d26e78ac5afbf93eaed36d5e9f/vifunowo.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/lesasafi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d90c7a3b6---1329525775.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b0817727d342f5dfb97551019d717a86/nurisat.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/9849711025.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/100543245334.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/05e1297bb1faea1b5bf080bbe4576a26/mopirula.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_off00015f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F07 18696 bytes
SHA-256: 2dca4bdb2d6b1a159f8e0d45cba99714f154ce17bea65206f5066a25e7528c66
font_01_sfnt_off00018fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FC0 10868 bytes
SHA-256: 83b70e2dd83b07e940966eadb8d9909f53c0d4cfaa732632fc6bbb435852aa84
font_02_sfnt_off0001a8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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