Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad7ddcb14009287…

MALICIOUS

PDF

61.2 KB Created: 2021-05-31 13:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 522da38acbe797d0d5bacbb059f80aa4 SHA-1: 35b9041db966a25f3f31addb9ac2885df4033627 SHA-256: cad7ddcb14009287541f6cba7c3d299d52bb6e0f52c45d107f8ce8da6ced666d
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing a trojanized payload. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

Heuristics 5

  • 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
  • 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://pixomot.ru/uplcv?utm_term=delonghi+ceramic+tower+heater+instructions
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/gel4r0la2qdkpbmtkhn6dr8ldh/jizezubemaj.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0fbcc220---xepupevojaxiwux.pdf
    • http://caphegiabao.com/upload/fck/file/74369545971.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/54065868005.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd0914415---kinepejoba.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/1475eb31bc4e3ed12e7d1c862b088d53/52193168963.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729f541cb19---suwasigewamojeso.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607429197ec8a---23022516946.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607752287c7b7---xevafarop.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f6342c56---volawebuvojizovuwox.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae705da984f---nuwazexuwibitifirufajixe.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad5847b27---96860543746.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/dopalitabinibotedobo.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c408de4cd9---83551460253.pdf
    • https://amd-export.com/site/upload/file/wulututububopawixixubam.pdf
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/nnbi48tpk0bchtqo1flcm6jr0b/tazagavumonuvuba.pdf
    • http://paillasse.hu/userfiles/file/wuzidoxugoluwejegojikuxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e757.bin
dc9bba4644e949f5fa4f7ecd97fa1f7bf92819680cd6f72773a8dd552f56eebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5304 bytes

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