Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7804ebe37536ab…

MALICIOUS

PDF

62.0 KB Created: 2021-09-25 04:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5af55fb4667848cfacddcd43776dabd SHA-1: 2058957de50ed23c504a66da19c173cda545e2cf SHA-256: cc7804ebe37536aba1016e01b5c1d283a17aa1f41ce9211fd7f91e9286d13584
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7140

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://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/f52224254ddb42c23bf1d24c640b2fad/sogoremewirugixosiwib.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1703eebd1---97796331932.pdf
    • http://jowinbio.com/upload/files/202109141052223338.pdf
    • https://francemonde.news/UserFiles/file/sirure.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/lnjunte533sln7d8drg5v6o73n/nadevunugumipigorimo.pdf
    • http://cameralehiep.com/hinhanh_fckeditor/file/jitifujexijenako.pdf
    • http://pivotal-technologies.com/userfiles/file/65557727238.pdf
    • https://greenfins-thailand.org/uploads/file/57849200303.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/24248864594.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/h5s9p4af4mdf6ospn520aoqe4v/vawadewudifotijeju.pdf
    • http://vhktn.at/images/content/files/daved.pdf
    • http://phuwangnam.com/user_file/file/28328764113.pdf
    • https://preprodpcb.com/userfiles/files/62775297445.pdf
    • http://kasintorn.com/images/upload/files/debawedewepijipadipogego.pdf
    • http://eros-arena-reutlingen.de/eros/userfiles/file/21207248209.pdf
    • http://solamsys.com/userData/board/file/rifopiguluzujuredikiz.pdf
    • https://eksiliotomotiv.com/upload/ckfinder/files/razujoxeda.pdf
    • http://saktigroup.in/uploads/82191996909.pdf
    • https://ezastupitelstvo.sk/editor_uploads/system/files/74322949756.pdf
    • http://okfilm.kr/userData/board/file/dexexig.pdf
    • https://thietkewebseo.com/webroot/img/files/topamokizimipupilasa.pdf
    • https://vico-domrep.com/ckfinder/userfiles/files/93243462067.pdf
    • https://mediaget.ru/userfiles/files/20811960423.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=my+life+with+bonnie+and+clyde+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2e7.bin
f187c29bae08e2e33bb84a90900d1ec09db121ec25b3c136d4e1706fec537b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E7 10784 bytes
font_01_sfnt_off0000cb77.bin
691a70d86c512044efed08afa705e58437008c91cd84bb6883f5f62c8f5ad3fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB77 17740 bytes