Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fab88a9ff2e5f12…

MALICIOUS

PDF

81.8 KB Created: 2021-02-06 04:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74f0583709aeeab64aca1df382b66d36 SHA-1: 9de8359501d2094d0acd0471a038c79304226ee7 SHA-256: 6fab88a9ff2e5f12c2f734a62cd9e3594cce0da96034b275a54e19d254f79122
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or redirection scheme. The primary attack pattern involves luring users to external sites via these links.

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 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://leonvi.ru/123?utm_term=find+out+the+continents+and+oceans+in+the+world+map PDF link annotation
    • http://mishgen.com/o_exacto_mesmo_correctoba1wj.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/sagixa_zajabovunek_susidafefoxozur_romelero.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/587190543076lo1b.pdfIn PDF document text
    • https://tozafutesaf.weebly.com/uploads/1/3/4/9/134900259/6678818.pdfIn PDF document text
    • http://rowaxuxot.22web.org/51595657569.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/bidivinifajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_6001c96d7bdac.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/5433689.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/wikogor.pdfIn PDF document text
    • http://zupuvotan.22web.org/game_center_apple_auf_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_5fd0d8b2c0b72.pdfIn PDF document text
    • http://vezerfa.xyz/platform_games_list_pc1qx5t.pdfIn PDF document text
    • https://fatuzolawodazu.weebly.com/uploads/1/3/4/7/134730183/8367972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489264/normal_5ff8054d27903.pdfIn PDF document text
    • http://copyrightshelpcenter.com/battletech_beginner_box_rulesvzrzl.pdfIn PDF document text
    • http://tefukuk.iblogger.org/action_movie_2019.pdfIn PDF document text
    • http://manaxupupili.iblogger.org/memes_stickers_para_whatsapp_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofunuxemijowex.rf.gd/14443203003.pdfIn PDF document text
    • http://susebuxusebug.epizy.com/18281022045.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_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 5360 bytes
SHA-256: fb9c3518bd609133dfaba5b236d38430764184b5aa1a0d6ee72f841a65fa7ffc
font_01_sfnt_off000114c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C1 10856 bytes
SHA-256: b62e0cad682402a62f96069b80710d2a6229f496c66ecff7686e34db1b9a8fee

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