Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68cd3a076e2f829…

MALICIOUS

PDF

80.0 KB Created: 2021-06-19 19:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f323ff319335eb3dc8e04a1fece39f74 SHA-1: 42d839ef194b1ac5169114a4ba7893b995629d34 SHA-256: a68cd3a076e2f829f60514a2b1c5ae0adccd809b0ed5d3e3100fc23779224e9c
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed for SEO manipulation or phishing. The presence of 'utm_term' in one URL indicates tracking for marketing or malicious campaigns. ClamAV detected this as Pdf.Phishing.Trojan, and the ML classifier strongly agreed, indicating a high likelihood of malicious intent.

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://ketchas.ru/uplcv?utm_term=gta+vice+city+mobile+game+cheats
    • http://zwickerfoto.hu/_user/file/wurokaruwitavikeletajabe.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/b04b75407d3de5b629db236d496c6015/guxetagijelavamadade.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/091o3pm4t8sd6tf5b87dvc2d8h/sekinijokijezudidubaru.pdf
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/41176531977.pdf
    • http://adirondackseafood.com/ckfinder/userfiles/files/bupelokogazis.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/f912d58e6b2afd1252bf9a2c802a8944/76123091091.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c8c7874247---25251712519.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/ad64e717931c5d21d9098eb9e6ac1bc9/xumupojomapuwo.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae02f7524de---wezutosezimapiz.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c50b89c1c71c866c3ebf785905af8ca8/fuvenik.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/cgemps04ug41kosg2eeaemj9ia/vanulib.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b529a323a---5047940510.pdf
    • http://pivotal-technologies.com/userfiles/file/13476305635.pdf
    • http://poltinik.ru/userfiles/file/toxunavowe.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608547f795bc6---jetowuguvaped.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/65391030287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f856.bin
bb2882d34fd674b88b11ed3fc929294fc1e6492ae2589f5e4f3240f8280a4101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 5452 bytes
font_01_sfnt_off00010acd.bin
ed3ce79a5c90ee56ba9ecf7d0932e7d2a6b9b1d6bf6b21e4b4067bd1cd55c61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 11284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.