Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e729e96cf26036…

MALICIOUS

PDF

73.2 KB Created: 2021-02-12 04:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 554242dfc3cf05b57373bb2cb9ec099d SHA-1: 54d32ddb07060c9ed463acaee39c49244b6a8542 SHA-256: 07e729e96cf26036a4d80193eee7433e9cdebf49bcd5cd8a46a4d7cd5405fdcd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to potentially malicious 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
  • 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/123?utm_term=areas+of+expertise PDF link annotation
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/nilem.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/9heTChd/vomibavox.pdfIn PDF document text
    • http://mainsale.pro/swipe_brick_breaker_apkhoyvh.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/tjgliiG/degezuvewixan.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/fixefopifowejif.pdfIn PDF document text
    • https://nafugawiwira.weebly.com/uploads/1/3/1/4/131438392/6485799.pdfIn PDF document text
    • http://doctora.club/square_root_chart_1_100rjddt.pdfIn PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/zerewokaladi.pdfIn PDF document text
    • http://jirafka.space/sumedaxa7on9.pdfIn PDF document text
    • https://jowidizikut.weebly.com/uploads/1/3/0/8/130874332/4793541.pdfIn PDF document text
    • http://springtea.space/sudoku_puzzles_very_easy_9x98e0cb.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/319b85.pdfIn PDF document text
    • https://weneboremuneje.weebly.com/uploads/1/3/5/3/135317625/zusulumiwiratezu.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/rubes.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/Y0geiiU/capitalism_examples_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/ghaThjF/mini_arcade_two_player_games_apple_tv.pdfIn PDF document text
    • https://botironuz.weebly.com/uploads/1/3/1/3/131380999/xuzurimulovusiz-vevapididovubik-lazepixero-tebunetax.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/gomaxod/28930674607.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/52954699263.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_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 4920 bytes
SHA-256: 25a8c52a1d04372bfc50504f2dc22424588ac481799c44e5bb288a23e6aaea45
font_01_sfnt_off0000f2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B3 10816 bytes
SHA-256: 0151a432ef20dcbbb591d6bde24552164d7b6ca1be4118921e96581718da4c69

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