Malicious PDF — malware analysis report

Static analysis result for SHA-256 d295d4bb57ed84d4…

MALICIOUS

PDF

79.1 KB Created: 2021-05-12 19:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a86d43c3ca65a2ead55494a05d30dd SHA-1: 87eb715a2617607eef45a87d3c7f32c7940bfb79 SHA-256: d295d4bb57ed84d4ab0cd2223b9cbbd4f82b157d386df27c039723522c4c97c9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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://huntic.ru/uplcv?utm_term=afcat+1+2015+answer+key
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/98g0oi0uj3uljpso6f07tbht5q/venikurapipali.pdf
    • https://arhometutor.com/userfiles/file/25682635021.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fb1b39736761a5140f9ef2a468d3b10d/zamibazakajefipa.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/h8vhs59s7kudvipqm73ubd7ka1/19108511285.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607064fbc029b---39824494801.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f013f274971d16669569e568d4e1a8d0/77694861246.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca60228a1---38608288427.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/fenojidisizezejesitujinad.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5cea122b00268ecde6784cadd9f9d05d/60745403687.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607989861daf6---89273334912.pdf
    • http://aarogyamedico.com/userfiles/file/bobesuxufesenatobujanatu.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/74b40ddb21f014f0ee6176cf47e8c457/9932393195.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160830db29d0d2---61802998051.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7cecafbb1---mologali.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/f01772052447e6fce7693518ae0121fc/muromaniwerizujabujoraw.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/82bb45rcpgjlqcngdjnkibnhhg/82625865905.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_off0000f7c7.bin
43f37ec7df1a662696337aca9d7fbeff63b7ca6da894e6f53c938368b6afaac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 5540 bytes
font_01_sfnt_off00010ad8.bin
b9adeb6edb6c78fb6217a5063fcbf94f8cc1eb2f13da8b17e3f8df961a14b4c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 11024 bytes

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