Malicious PDF — malware analysis report

Static analysis result for SHA-256 a229a4648eb7e390…

MALICIOUS

PDF

87.4 KB Created: 2021-06-29 20:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b7f06cd3ade44bbd6f9fe35d3173fc55 SHA-1: df6bd9a34c34e1f9582f9bd4ce3ab2b509ed87d6 SHA-256: a229a4648eb7e3904260b7766fa11545fd6629054f41d621fbfd6925d116049a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely a phishing or trojan delivery mechanism.

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://laborke.ru/uplcv?utm_term=insomnia+for+a+week PDF link annotation
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/24367198267.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dfcaebef7---73783697772.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/muwujizefesekirokaziw.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/96fa1a0c0e503432d2d7be8a7fdf729e/4340593479.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16087225edfb8c---lolimunakafo.pdfIn PDF document text
    • https://summit-christian-academy.com/scauserfiles/files/kurozixevojifojudis.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87c7fcb6691b9bbd13d5b887e4a690e0/51286271589.pdfIn PDF document text
    • http://mebco.ru/images/file/28080994727.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/33767811704.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/532dce3f2d39b0bf3d1ea459c4389f51/61468285597.pdfIn PDF document text
    • http://heureka-cz.eu/files/wisixuwabezax.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6a9b4889---dawuzujitibewerilofurizu.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/50816465496.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160841d9933e46---53438246737.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c93de4fdd---mugepafolurijogexuzavigo.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608504b403771---bevuzoludakudu.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c940c4f6a9---sexorifogiwewutupozajuzak.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a455e79768---84271219840.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/713593762861bdb1564930b613d3596f/bajubifakupasojanujaminud.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0916574df---31784457503.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/gimibamij.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/dojebuvodaga.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/jajovizadimip.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/dawuvarop.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 10360 bytes
SHA-256: c978a6189b1031933b36dec32d8b2f1bbdd19065d8f801d45d79823bc1cb9941
font_02_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 16544 bytes
SHA-256: 4c55000f66541c206e9faa0eb985c9df6ecf6b7ece9b829e71bc245a911f1aa1

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