Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd65594ceede49fc…

MALICIOUS

PDF

69.1 KB Created: 2021-05-31 16:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce5fb88bf61175606b75bc9c2d041c2 SHA-1: 2099f5ad993dc9c051b4e51c0e66957f190588f7 SHA-256: bd65594ceede49fc9e1edad9699e901738cab03d9cfb921517446517448548a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a310056231d---rifigigowo.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984d43efa26---28853149193.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952fdcf28dd---bokesevozegu.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160aa647859fc3---jifazu.pdf
    • http://adabaskimerkezi.com/upload/file/xufadeteweliwevemame.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e75ab59e---42175806676.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077a3f4f1462---21721989061.pdf
    • http://altaprecision.com/userfiles/file/xawurovu.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/bfb86af950f3708396c530c83f59e91c/tejaxetu.pdf
    • https://bestofbucerias.com/upload/file/dekaxapuxe.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609049ea3dd11---44820404443.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/f6a20fd2d7199b9745f838af478f04bc/94916081801.pdf
    • https://nbtele.com/en/cache/fck_files/file/78108573463.pdf
    • http://mea-travel.pl/userfiles/file/fowuxasakogejudagoviba.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160795d25cab8a---83410913313.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/feec8218b4b0dedb72dce9f2fdd32d2c/jodovuzarezezag.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ea609fda49d9fe11dc740bddd704f638/28911895787.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/08069582830c8fa2790f6c4efeefdc32/73106641702.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=city+of+thieves+audiobook+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d172.bin
c26524e4c3bd33f99b83a2a37b6fa8ba2441e255ab17089a1d9863f54f5136f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD172 5232 bytes
font_01_sfnt_off0000e346.bin
917579fa9b888709c766e57a2b0812196cdd6e3cd4db9ffd632ea25606b20a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 10596 bytes

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