Malicious PDF — malware analysis report

Static analysis result for SHA-256 98671099ffb859da…

MALICIOUS

PDF

71.0 KB Created: 2021-05-23 04:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8285f81a024336ca92d6babc6118ca99 SHA-1: 049726c28afced95067da79c9ba82475ce899d69 SHA-256: 98671099ffb859da3d580827b89d050e19e7d14bdef7dfc6dbd0fc557edf54f9
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to sermon outlines, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9571

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://drafthe.ru/uplcv?utm_term=bosquejos+sermones+textuales+listos+para+predicar
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d98fef7c9---73718795363.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160885a20ecd6b---mizetobut.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e212b4ca50---tajazetodigulelekokata.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084345ad6213---tijibobixiwipidatemuvema.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/f7f7fec8c74371dc57523b33700617df/tadaromepebifugoxawobivav.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d52f09cfd4b2f7c32763491842650ac3/gizubazumapikomixagakuva.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1db962f64---jurodadovomemikaged.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/bgm8847vof9n7eiog6h7cc7o24/7438811318.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/29ac1485fd773fd4b87722ba8bf00186/73713674200.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607946739d798---12708979060.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9bf6aeef1ed5b580b1be51b7bdf61946/binasodivewojazexotevute.pdf
    • http://all-pass.com/folder/editor/file/62146301272.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e55b902c5a---sopuwituwab.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7bb1a687dc34c64e5705e2aab5a7c9f3/besoxavolezinut.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_off0000ed5d.bin
0cf0159b0a5be9a1d3c332f5bf21f19e77310d407b817b365c324a683f735185		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5536 bytes

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