Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea04a68f65478e76…

MALICIOUS

PDF

176.4 KB Created: 2021-08-17 22:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 341ef97b41ca87fba46853d5ab7cfc73 SHA-1: b0e5ff870b37d116f276ab61a90034ff6da39a95 SHA-256: ea04a68f65478e76100c49d6767e6cf74355d7d8fcdf3e6e6fd51c4a90ca0381
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of these link farms suggests an attempt to manipulate search engine results or direct users to malicious content, aligning with phishing or SEO spam attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://hansenlight.com/UploadFile/files/votuvakufu.pdf In PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b3cd08b7a---42590023543.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/3a2bb095e9330c7378fc87f47375907f/togituramisajinelanujip.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kaset.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/kakoputiwaz.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084da84d28ff---vaponefeminafawetu.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/kexekomadonadujegedol.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/xomorurufixexakevevu.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/00ba3b06c62e0844a1583310b78bc077/karako.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df64643ee---mepemadas.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7d412q0ma3nlu8k7ietddimcuc/22354717129.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xulovorumebakiketuguwe.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac076569feb---nijumamaxufu.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/19395840817.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc90dddf51---1091797897.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/60b4d02605159d014d4d19af0be62fed/bixesogenekev.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/a3jq0supgeae0fmtopl1phkv30/famovunowexajitide.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/45646719570.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/vonajijodo.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b9b4dd8fce1a6f4850ce02ea6f6c8d19/jotekawimugifimavotimodu.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/83122894162.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/zejuxupazojag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=cr%C3%B3nicas+del+futuro+paul+amadeus+dienach+libro+completo+pdf+gratisPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EEA 11476 bytes
SHA-256: 4c483116d0a361dc2d5133de7c1885a44316f6ee94f9b33f68c7d9e75203d92d
font_01_sfnt_off00026931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26931 18704 bytes
SHA-256: 7b415d62a5fcf1c02c1fbff12eece37f2e070b3850e873c24aaffd31c6c6f1a0
font_02_sfnt_off00029812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29812 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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