Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7abbd2078221584…

MALICIOUS

PDF

93.6 KB Created: 2021-04-14 08:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 74e8fb7e2668f4197ab162e25a9290fd SHA-1: 9d03aea6cbc0b4f8ec5dd920b28d68d650d4605c SHA-256: d7abbd20782215844791a4a9dd3c2e27352e4b750d5a59e9abbe2258643cfa4c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for SEO manipulation or to distribute further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malicious redirection attempt.

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
  • 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.
  • 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://bologen.ru/strik?utm_term=history+of+new+media+art PDF link annotation
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/8185196.pdfIn PDF document text
    • https://jalebipozufi.weebly.com/uploads/1/3/5/3/135320073/likelifinidevi-vipezijime-katafagapuvo-vipimaburoxes.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ck2Znjc/42325664596.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/t3jjD8X/bubble_shooter_with_friends_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/Ygjf8ig/ice_blasters_clay_pigeons.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/dXjjQ30/53044509357.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/classroom_actions_worksheets.pdfIn PDF document text
    • http://wibedepotemuru.22web.org/minute_math_worksheets_multiplication_and_division.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/jovimosubexudedixawo.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/vesiwogupegapovezotidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girinuluzu.rf.gd/assassin_s_creed_apk_for_pc.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_6ba5c4535c854c94a9afb42ce63d74c3.pdf?index=trueIn PDF document text
    • https://dd91dc4b-d2fe-4aab-ab17-22023aa64d5b.filesusr.com/ugd/f05b1d_b9f674e586524e80a347d833a5aa05b4.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_948e21d5d2724c2883d15398066d98e8.pdf?index=trueIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_9dd4e5bccd1a41d1a114ff2650581fad.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/social_anthropology_books.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_9653b58356a34487b3c4a9ae65ddc1db.pdf?index=trueIn PDF document text
    • http://bukaduxanob.epizy.com/67309893397.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_off00012f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F40 5176 bytes
SHA-256: 2ead192e1926f6ae1eabf5fb30dcad862fcca88c27291cbf0724e8e6614dd9b6
font_01_sfnt_off000140d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D9 13028 bytes
SHA-256: a36cc5e779a8a32781a41b447e7feb470ad491d0c2b96f414e11a08025b0f81b

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