Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd5809a05b4a201…

MALICIOUS

PDF

65.1 KB Created: 2021-06-13 17:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4e011127f716e96748e80722bb27f60b SHA-1: 3ae662be853d6a368a577cc01fefeed445ff6c91 SHA-256: afd5809a05b4a20105a785495775c70207c946545896e815910126dc8eb72198
156 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it functions as a link farm, leveraging SEO tactics to redirect users to potentially harmful content.

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://krisoc.ru/uplcv?utm_term=star+trek+fleet+command+mission+dark+space PDF link annotation
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d2469f44af77400776317fefb0a81ea6/vodagimelofebiparejal.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/9068840583.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e162ede680---vobux.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/46691504572.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/08a1cppgh9jqln2le3bmcgrk87/rabulekirasuxibim.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/6112989560.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9c7ecb9c7---pifomitozus.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943573337e6---perawerivowunigazejapo.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ad5be92bb2d854036da4e4473e650693/35863199441.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/k9lnl675ik96667oop2ie8dgm5/88487490032.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/bowagokezakid.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/u7q8h654e1ft0e2a5j2vhff2ql/kenibapoxesuripe.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/v0kc31v55d11qfp34vdsv3buqs/kituledopelosefixafav.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba3bb42a9d---63496660965.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/gazibozozoda.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/2795046509.pdfIn PDF document text
    • http://kasargod.net/uploads/file/79264150061.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_off0000c198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC198 5468 bytes
SHA-256: 292b07bcb6619a57af7c9f1b8f16b51ffe21483dd888e9aaf66119594e4e109c
font_01_sfnt_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 10304 bytes
SHA-256: 9382a5df0e2870588ab42d8cb304d8b8c809d4b8f662ab6a51094ab76a2230a5