Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c206c107370e144…

MALICIOUS

PDF

74.5 KB Created: 2021-06-12 14:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f4244f14d46951c9b1bd1ff7f363ee8d SHA-1: e7033de88311e63eb1d067a3253933eee597eceb SHA-256: 9c206c107370e144db48e7a2d929f096e3fb13d5cd39ee04ca8cd4c8e62932c3
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://inwebjor.ru/uplcv?utm_term=shadowlands+leveling+alchemy PDF link annotation
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099b95fef7b6---69529532350.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964b7261ca9---93124739691.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1336401cc4---25554100048.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/beindffg2sglpe731vu9cb29c5/82801490218.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5574678cb8---jilumonebadefewela.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/41647399585.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608882bab8609---77140194842.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/79522673642.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/aa77f7dbbeb86ab916279c6294df3743/24572149590.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/62321074001.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/28634298544.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/30514825563.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa15378a565---57525892329.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/80975226050.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b9e5ca3db1eb6f712def40826cca9835/16774941510.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/sutubefuludetejike.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/c02037fd95997abefbf79d27153e269f/70545961159.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_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 5612 bytes
SHA-256: c4f8fa9b2e7bf28a7fd4b13a15999f91d86642627ac29d64ba0d26c312d98a2e
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 10932 bytes
SHA-256: 0c8a0e1b62da8246556c6b30185abe2418bddb0c626267ae73956f9730c0cc9f