Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc76c7d69596900…

MALICIOUS

PDF

90.3 KB Created: 2021-08-02 23:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: facf45c69b8e8a22436097ee1826e71a SHA-1: 6181c414e81f1a06cea0d87865f0a7b348f70421 SHA-256: fcc76c7d6959690022e01e80c9d835b8aa824e71672b5dc815c7ef409ef471f7
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 as malicious, including a critical ClamAV detection and a high ML score. It contains a link farm pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a300e5d1708---61544985824.pdf
    • https://nikoljski.com/ckfinder/userfiles/files/84558445830.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872faa1904f---47998012149.pdf
    • https://lemanssrl.it/file/43112022664.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b0fa3677---59658486082.pdf
    • https://primer-spb.ru/files/files/lagirukakefuzadaju.pdf
    • http://ampletrekking.com/userfiles/file/finevunurodetuzikuzuxelax.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6c57edc1030a072ee545c82707f042f1/21751278924.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76aae9554---71164770382.pdf
    • http://crm333.com/documentos/file/lejolifulixi.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608093eddb1f1---pakonaxipotekazegi.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b016548308e---megabidagun.pdf
    • http://cementfeet.com/userfiles/file/xagumubuv.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c34a3a9d775---sawasijorenibufaga.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/rmasfh5i2lrsreci1514v8no29/93339060592.pdf
    • http://gesundezellen.de/neu/userfiles/file/45879823458.pdf
    • https://grandplaza.bg/uploads/assets/file/pogiriwutonira.pdf
    • https://careersourceokaloosawalton.com/files/public/42860983727.pdf
    • http://savitaco.com/uploads/images/files/55579200520.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc1ba700b---gariden.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f4c02ee2d453b514afb0a27a873940cd/58897560365.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/31b38b1bcdc3614a6617f3c6fdbf56a5/tazogezadokubisovu.pdf
    • https://avonsteel.com/UserFiles/file/vibuxulun.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acb5f4d22d---situxuw.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d6o5q7eri02m7pgk3qnvkhfso4/gipotana.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ugg+avery+comforter+care+instructions
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/047ababe072e878ad40d45ca6995e2c5/bemeto.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_off0000f69f.bin
a4e5e2916b09fa82c6c2ee408ee4530290f8526ce2e6c2742038562876d659b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 18768 bytes
font_01_sfnt_off000127b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16792 bytes
font_02_sfnt_off00013fc7.bin
1d1b546cb82452a4059f378006abe6498f7f1276486479ff41e9dc46622f4419
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC7 10920 bytes