Malicious PDF — malware analysis report

Static analysis result for SHA-256 967c714a89df354b…

MALICIOUS

PDF

80.7 KB Created: 2021-03-14 13:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4a5caa6b35769e6b6dc322649775b931 SHA-1: deed55c51f6ad2dcb6c3cefa6c6bd4674a08e130 SHA-256: 967c714a89df354b4be83502f2fe18a39b3d6f9a92848ead174b225bae8bee31
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to lead the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=calorieking+taco+bell+cheese+quesadilla PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5ffa6c3ac0e68.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/tisejojitan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fe5fc2eca655.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxibila/nighay5/weekend_at_bernie_s_cutout.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5ff7cffa5d4c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417664/normal_5fe29bb213cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_600ca59c11752.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/0jieheH/fire_red_flying_type_pokemon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_6007614682bc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5ffa28e8caf07.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/najubesekalaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/bloke_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/75003614244.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/jabukinabawi.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/chameli_ki_shaadi_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/50152298049.pdfIn 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_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 5436 bytes
SHA-256: 593d91bfbe4b5c2c0e7cadfde5f16e2b20f9ad3f0eb1e218bebe5624cae0bfe2
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 12116 bytes
SHA-256: 5dafae4bedbcce2cc25a667d793ad27eca3dfd41f3972de0c2b8173b8f95158c

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