Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dfb8d1627df6bc…

MALICIOUS

PDF

88.0 KB Created: 2021-06-25 21:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ddafc88acf4b52c438586c1657c92a65 SHA-1: 744a1443ba73ddbc3ec5e6e0846480415c2bcbde SHA-256: 92dfb8d1627df6bce9df6fa3e5c2d22f0bee11d7a155ffa0dd63d75c61aeec42
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 ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised WordPress sites and other domains, which is a common tactic for phishing or distributing further malware. The presence of multiple external URIs and compromised CMS upload links strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=sore+bumps+on+the+back+of+my+tongue PDF link annotation
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093ccd7ea9bb---52036824903.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/q0e1vu7p5p1obgegao08p5t7uv/54123674302.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/fddecc7dc9748e1143617b28d417bc91/99606829899.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6fd135d141a48aaca92a6ce96866ce1c/befodipana.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/96445284585.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/57021723818.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/22004805788.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7f921b7b6---5178639041.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e8e7f55526d69ab7c29913a4dd6c1172/pozibotolifatuvex.pdfIn PDF document text
    • http://skisun.it/userfiles/files/36931567866.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/19381810814.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/logojixapipawuraxaje.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7b8c6383---zulodezas.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/226f9e86439ccf3013ddb87d775d7b69/7951261502.pdfIn PDF document text
    • https://congchung7.com/upload/file/57593707138.pdfIn PDF document text
    • http://fygl.net/uploads/file/241653352328.pdfIn PDF document text
    • http://93564497.com/userfiles/30060435305.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/8f7f02b352a80cf54c09c8a4f8b1fba7/xulowelotugepewe.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/6f01dca3113b137be6ce7f03ba8553df/65339566698.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/31151570487.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/68151109647.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/lejegagok.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/rugafarofejazovejewuxuno.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210517232928752331542.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_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 16704 bytes
SHA-256: 8ac3c222bf2d46dc1ef72f05e6b628094a8b555850c5be46395de3d379a038e6
font_02_sfnt_off0001385d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385D 11312 bytes
SHA-256: 08cff8fa2a2857182eaf678749312f687da977b14498abbdfe331cb6afb348ea

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