Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce678a87cdcc302…

MALICIOUS

PDF

86.3 KB Created: 2021-07-01 22:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3cdb430c50d6e7cd006282c024e7d8c1 SHA-1: f0b5a6fb660f906a90ec30273f57043efb198799 SHA-256: 5ce678a87cdcc302fe7b858b13f60a07272aed3a507b4a825fbec1cade77b0fe
224 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection. It functions as a phishing lure, requesting sensitive recovery information and presenting a fake download button. The document also contains numerous links to external PDFs hosted on compromised or disposable domains, suggesting a link farm designed to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=how+to+remove+an+electronic+signature+from+a+pdf PDF link annotation
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/fql9i4781u15l51rbes3kgniu2/11607649173.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/sipowolu.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/xesote.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ef6972301---nikumarevogezureju.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/rslfql2bf80808n9u5l391f3c6/82313668505.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/49190211587.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbfb43d673---tovunofawoxijolerinoxaxe.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/bepojazekewigewin.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b75aeb4dd9a---nibamamevovudidaxas.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210628192211_oxy3ik.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021627738386714.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcefb4224f---fuxebewadabakugo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/23ef55924f5f4e850dc611fc9a7bea45/70880594594.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3a9793c1fdfd178cbc8ed9540b632021/54492632360.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a830f8c1---57113695081.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/piribura.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/67101841541.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f20d4b66---38956783389.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210629202115-mixeriv.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6caff9019a370064b35dc29f88e3d31b/36455386807.pdfIn PDF document text
    • https://kham.vn/userfiles/file/wuledu.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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 17636 bytes
SHA-256: 0cdfe9e7158e9e615cbf4476ab2fdbe8f7e9765ff32208796a94aa33e4d7e568
font_01_sfnt_off000117e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF8 11204 bytes
SHA-256: 0ffca3c88c7bc4021f1651bb4499efc0eeaf73c833102860b6e3527973411394

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