Malicious PDF — malware analysis report

Static analysis result for SHA-256 345a39b2237c4d49…

MALICIOUS

PDF

82.9 KB Created: 2021-06-12 13:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f125ac29c9a41d399869b803f1cf5b80 SHA-1: 698df9e3066aca71a4c3ff6f24f656ba614edde7 SHA-256: 345a39b2237c4d49eeaeedb7bcae44f832ef2893e850e7766b56f44978c16a09
156 Risk Score

Malware Insights

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

This PDF document employs SEO poisoning tactics, presenting itself as a free download for 'Mpsc books in marathi pdf free download' to lure victims. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=mpsc+books+in+marathi+pdf+free+download PDF link annotation
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f6177c03c---90731802365.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703fc71b096---588488911.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/10880517473.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791dd5f3469---genenanasarajakuluvosutaz.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3061129b---25607371884.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ab4d3111b1adc517119c78a2f38dd404/leremigixuxasegu.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/8835e78ea56df62f362cce9ac1337817/jaravuwisaxejinuwaziwepo.pdfIn PDF document text
    • https://baongochoa.com/upload/file/nuwigapuxe.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/79eecd8eec4374cd6b036e2b0926ba61/2947540494.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b9afa4850e8b1fcd50ef68ccd52d80b8/firoruzawetedep.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/12671c28a1c5b514f3b62e5b82eba2a1/siwanovowudera.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c42927e8cd8---84463756461.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160729c8299279---90945132936.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877dffd1aba---3531537356.pdfIn PDF document text
    • http://axwelindia.com/uploads/33317113590.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/pewilakatufupumosadom.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/nth1g4odcqlq6cbh607ghijegv/73485221678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAD 5696 bytes
SHA-256: 66490742b8594ab54686e06e45789863b74141b67e5bde7583bf9ce4571fb1de
font_01_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 13308 bytes
SHA-256: 62d5e718ee71e25f1dba6098978fba59c17ff780f04ca659e20fbbd16e249c3f