Malicious PDF — malware analysis report

Static analysis result for SHA-256 6470b8e55afa2693…

MALICIOUS

PDF

84.5 KB Created: 2021-07-31 02:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 298c143d46355465a426681a70fcb828 SHA-1: e8704da0d8ef37f932ab46509008ef0388cced98 SHA-256: 6470b8e55afa2693ffeedc6263a987169ccb179a1628072a5e3e2278e657e1af
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many hosted on compromised CMS sites, 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 URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://hainescentreasia.com/images/file/rarepaxajes.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cb8c7a551---39343758281.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9426bba60---93171888673.pdf
    • http://jullien38.com/ressource/site-image/files/tavadavamif.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74ac95c880---vexujirupapogudalizu.pdf
    • http://kfbi.ru/content/file/81758926395.pdf
    • http://bachtungcompany.com/upload/files/82590731221.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c5931a94---kewetusalupiditozizonipoj.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/49618501d74374c70e9449e456b28d09/62258289032.pdf
    • https://mosconi.net/userfiles/file/wonemobisabifigegufe.pdf
    • http://animationcoach.com/userfiles/file/kugufepamukobojunigote.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/77b69c599407de6d13a25052319a39fe/549319412.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/5897837c820a6d96f6b25c18d2bc73ea/8544255788.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/87008182702.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/87117509256.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1be424b3d---81716172116.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb504acfcd6---9276987120.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/hml3rtkmo632jt0qhu3luj0cr4/reriwebetedumerulo.pdf
    • http://quick-thailand.com/images/uploads/file/defesizozugiloned.pdf
    • https://amoslodge10.org/ckfinder/userfiles/files/mikobawireberod.pdf
    • https://roc.mn/uploads/files/mazozugugajada.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b8e22270---11862690415.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608168ad9e3ed---89394763216.pdf
    • http://chetaomaynganhnhua.com/uploads/files/59807188163.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+do+you+do+when+your+pressure+washer+won%27t+start
    • 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_off0000e761.bin
db188fbc51ead72a0ddce39417b2858b5d0dd3d3e9850a1bdfad3426a36469e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE761 10676 bytes
font_01_sfnt_off0000ffe7.bin
d2d7040e8bba1995ea0b9f1acad061a433831761491c35ed52c32088dc5a0852
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 16532 bytes
font_02_sfnt_off00012aea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 16792 bytes