Malicious PDF — malware analysis report

Static analysis result for SHA-256 8216d40365da9f2b…

MALICIOUS

PDF

79.8 KB Created: 2021-06-29 20:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 607d161c9b11eef7bebd017be60696c5 SHA-1: 2e0ee7b7a5b6cf51889fcd2646e3acc7f7fdbe21 SHA-256: 8216d40365da9f2befa1ceacbbb5bb6e30802ac8f9ef1a1ae20595df3beabf6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains, likely serving as lures for users to click through. The presence of multiple external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=mp3+converter+and+trimmer PDF link annotation
    • http://vita24h.com/uploads/userfiles/file/2229223861.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/96255192093.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/tojuluridulinev.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/831ab853ec9d327651afcca541de12b7/telegolufixininewutolegu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/55c3fa95a2102644da0e2c579515b3e0/geged.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/033kfhuk1eqhcoqu6heo7c7j8s/kenalodapen.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/veluxazijab.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/petevarenog.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700959499b1---75914959989.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c74b64491d687fbb249746be68321b8b/74839317370.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/66933536098.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2fa80c247---665093845.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d538b9d038a---68451740227.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/nufeguzewulusixulo.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4705af17b5934c5d3c244c137e4dbb60/3646309551.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/8442ce3a6079251abdad9a2a23a0b861/xuwenetazibojosebe.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/91899350563.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/v8otnup73ei2iek3988vmuctcr/xazetobakijopiziroparuw.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a11f3684---85838451170.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/k2ps20ais4tl6itebo1a55h0cd/dakiwujulezuti.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/24a5449a782a3acb05e7b367491a9a0d/gobagepezavenebajin.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/zijumurinosumi.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/1184a3e9f0603773be13f1a75792d960/rujakapaboder.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/70946218966.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e0e21133e---wifuxerujalemomewirapi.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_off0000d6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 16444 bytes
SHA-256: f6f32144cce24fc34c6f4d259f94a9f7ef51835b09aa585960a33b5ba8989702
font_01_sfnt_off00010165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10165 10692 bytes
SHA-256: b741066d1136abae37cb10c375098582e9187a72c6fb00ba9ff0bcf3e7c8d914
font_02_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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