Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a08a8abc2457608…

MALICIOUS

PDF

67.7 KB Created: 2021-03-03 03:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7cd13356f3a1dc9cf352a8d6161886dc SHA-1: 3591c46e979b6d1fb830c95cccbeaf3d2629f90d SHA-256: 6a08a8abc2457608b60b39f766a859ccd5581164f160e490fa54d51a46cf9808
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=epson+wf-2530+ink+tesco PDF link annotation
    • http://xazezojalaz.22web.org/soxegewew.pdfIn PDF document text
    • http://zabavnyi-slon.ru/togofokojazililajvf1o.pdfIn PDF document text
    • http://2220202.ru/mardaani_full_movie_watch_online_hotcv2u0.pdfIn PDF document text
    • http://iranomics.com/93639309591ugo2r.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/5_example_of_philosophical_questions.pdfIn PDF document text
    • http://arendagg.xyz/dawataxitedof5u.pdfIn PDF document text
    • http://marketitaly.info/mini_dv_player_convertervdc4b.pdfIn PDF document text
    • http://pop-marketplace.ru/samsung_s5_active_casem04ej.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/11218056789.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/kigagoxagarim.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/30382298447.pdfIn PDF document text
    • http://meetcabinets.xyz/lisozedutegizaxibuxajou0g1.pdfIn PDF document text
    • http://you-bestshop.xyz/hp_deskjet_2540_not_printing_colorp75e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaleponijodo.epizy.com/10292965303.pdfIn PDF document text
    • http://fodukenama.epizy.com/how_to_replace_a_thermal_fuse_on_a_whirlpool_cabrio_dryer.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/what_does_exception_processing_message_mean.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/fefuxakaseje.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_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 5376 bytes
SHA-256: 9b370a100aaa18f973403a0a5b34ba71458d87ce4c75b0fa79c76374bcea0cd9
font_01_sfnt_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 10316 bytes
SHA-256: cd65033ea7882baf55d0347f9693d84c0da0cc5132438aa8ba183341ce66d22e

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