Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecbc88fee8a6b22…

MALICIOUS

PDF

91.2 KB Created: 2021-07-13 10:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d26e4eb1783c336de873b8be38de2224 SHA-1: 029ec140e65543a6be7a50e2858093748b8f92b7 SHA-256: cecbc88fee8a6b22e629b7f31d712beb5c51a13e5a25d1e2dfbf9e962db1b814
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The primary attack pattern involves directing users to these external sites, which likely host further malicious content or phishing pages.

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://inwebjor.ru/uplcv?utm_term=words+to+under+pressure+by+queen
    • http://rheumatology.institute/upload/content/file/momexadopegenujeb.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/bcf09a2370a5603b35cb0dea637e9fcd/lanipal.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6d2a92ac43f4ea407895824c34e39264/9996545701.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ad5910fad9ddb0a5bd1fccf70130f217/53052100730.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abb2e8038d6---dijiraduwisupewafi.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca024bf207b---94903804400.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/pr0jeu28h3rm0rhv20seojtfn2/493172464.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1be2311a4---63085424636.pdf
    • http://ilyxrace.com/userfiles/files/23339313976.pdf
    • http://kutscher-customs.de/gfx/userfiles/files/3393854871.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609718f2179eb---89206356663.pdf
    • http://snap-drone.com/userfiles/file/62633921779.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ma4nfndl5kun4nbiv525thp2lc/nimet.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095992bc14cd---46391724668.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/nipaw.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/13bce7d5da18b477f9ad826cf976588f/29818102445.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bddd752e69f---bewawonuzubekolodeb.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6490aa44e---papirozuw.pdf
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/tukopalapupoxajovijadu.pdf
    • http://huntland.hu/upload/file/78788660400.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7ff6621bf---fadewivizi.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606e850acf19c---lovabifazetovovezifewez.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/hjk5v5bt7b73gqluui6cl7uoj4/32190949587.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071df7716473---puduxowakot.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f2.bin
388483699117c6733a812c44e8ef54368cfc0b4e2bcb57b22b6d8081ddb62058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 17248 bytes
font_01_sfnt_off00012f81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F81 16792 bytes
font_02_sfnt_off00014798.bin
38e30c5bec267b8f5f90b678a7a35a65350abb6f217a3c885381c19d7eb06dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14798 10576 bytes

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