Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb0e6d20d66c021…

MALICIOUS

PDF

81.9 KB Created: 2021-06-26 22:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ea5305ac5394ce7b7830acf5673e2664 SHA-1: 396980162478bb351c8e636d74ae49c5f77068db SHA-256: ceb0e6d20d66c0211e1fd7f09aaf9d9981ef9809709d852e8356b2e15874572a
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pistant.ru/uplcv?utm_term=chlorate+ion+chemical+formula PDF link annotation
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2df759f47bb72337c6e8645bdd54d18e/fizuzizokinudi.pdfIn PDF document text
    • http://efrex.cz/files/file/kawolokifugogenexijix.pdfIn PDF document text
    • http://metapolar.hu/tmp/60801376414.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5g1t4p2p2oln8qk45ku6id73i9/79967723810.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adbb25aa0c---33076522936.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/61718985442.pdfIn PDF document text
    • https://medtek.vn/storage/file/51807325726.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e441f75638---jadobadorixajunu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/xetazi.pdfIn PDF document text
    • http://whatdwellswithin.com/file/43296559096.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0638d352---81731545241.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/354e3e18d41a93a39736662ee6c787b9/13140037642.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/8beae47315d7052b35d602735658d481/27030302521.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/6700a7a90b21c9464595c02f6643652b/boseg.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/15c390ac9d51ac78bb565f029aa67596/27996746099.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa2a66d0f1---mavakisikizokigarar.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32dc9ed2cd---fegawukabikosili.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0ff1efe7---datixil.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a791a58b192914393b2be8df1a29d3e2/23311838399.pdfIn PDF document text
    • http://billsky.ee/files/file/davafulifotepaburovesamiv.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d540032943---60439935810.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/67691366016.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/45186520193.pdfIn PDF document text
    • http://gyobel.itpublic/file/linavimuwigaxigepe.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_off0000dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD36 17272 bytes
SHA-256: 0f372a4b3cd309f10ba22727eef45ded9bf7fad0d8b365423349fa69b8554706
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 10564 bytes
SHA-256: 8da6dfa52e569123c6273f9d8dddcea92320de650c54c386c70be9d559bccd9f
font_02_sfnt_off0001221c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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