Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41cbb72749bebf7…

MALICIOUS

PDF

74.7 KB Created: 2021-03-12 10:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 46883309964256790df57ab710a62f38 SHA-1: 8f11cff382a1e8750fbcb50838092f12f868fc46 SHA-256: c41cbb72749bebf76a4b30f312cd8ff2ea809fae21e26a895f21839c5b016163
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'hacked' or 'unblocked' game content, aiming to trick users into visiting malicious sites.

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://lozipotod.ru/wix?keyword=diggy+hacked+unblocked+weebly PDF link annotation
    • https://cdn.sqhk.co/joxesinejag/cdhejhv/download_game_light_it_up_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369329/normal_5feda57188d34.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/vita_spa_hot_tub_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_604add6fd442e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5ffbb375896ab.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/2Itjdgg/98689875881.pdfIn PDF document text
    • http://pokemonrivals.online/20234389134dqkck.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/bjah7C7/nadaritol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376849/normal_5fe07eb347b97.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/sentence_structure_checker_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fdaab7804ee1.pdfIn PDF document text
    • http://itawegan.space/wunepuwut2xl0.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/7gfhggc/keveziwazapolugofumone.pdfIn PDF document text
    • http://50offshop.pro/fonifugazuretusujak6qg24.pdfIn PDF document text
    • http://bezprovodov.guru/what_is_a_jewish_prayer_book_calledok5ai.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/livivuvuwugeb/bikedimigubagufiwagaf.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/nosekisog.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/sketchbook_express_pro_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/27506656467.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_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 5324 bytes
SHA-256: 711768170daeaa2b875aa3ce47a2684e9ec99bb01bfb08bc5159de8f3ded35c7
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 15916 bytes
SHA-256: 7a6d59fdf2a7eb9cc6c0bca153a0d7484691f73f7d494326aa2f9a7d56d03989

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