Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09c980958080e09…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 19:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e9a11e86a89c3fd107f67ba2e2bb058e SHA-1: 20c9dbdcc4de8e042fa60b3a2212b2b253435da1 SHA-256: d09c980958080e09ab53c74dd575e69de1a01663223b6ee1738731d2db2fa9a3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=what+evolved+from+the+saber+tooth+tiger PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426269/normal_5ffa6d8e5012b.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/fikolikeviv_koratujuk_femes_mozubop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_600fcf3a0125d.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/cjhbrGJ/classic_tower_defense_ipad.pdfIn PDF document text
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/lixepogetomo-zuvafavafaxanip-mudiwid-devunuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_6036a64066b75.pdfIn PDF document text
    • http://formblckr1.xyz/kuzabagekoruse2gcy5.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/mPhabii/space_simulator_full_version_mod_apk.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/fugedone_japapigo_wexamofibilej.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/WNLdgfj/segekekoguxenegezalef.pdfIn PDF document text
    • http://bottlechainworld.com/bizanukivadomilagezdaluz.pdfIn PDF document text
    • https://cdn.sqhk.co/nogegamapagi/hehjckf/air_hockey_challenge_hack_apk_download.pdfIn PDF document text
    • https://gemujofu.weebly.com/uploads/1/3/4/3/134372819/4720415.pdfIn PDF document text
    • https://cdn.sqhk.co/rifelefiw/aIVhehe/tijebinukudixoluduxiruv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5fe13656877f6.pdfIn PDF document text
    • http://ig-copyrightviolation.com/world_war_z_game_trophy_guidexu6wq.pdfIn PDF document text
    • http://getveran.site/powerpoint_animation_tutorialbpovq.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/bikikanafopavu/acting_101.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_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5532 bytes
SHA-256: 2c4eec3497e38a12e9f22db8d90025a227a1bb4a0a76475b02fe4749667a45de
font_01_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 10948 bytes
SHA-256: 2cc2d5b89d8aea8ee403fa62208921246bf5ad4de7b06fea2264d633b202bc5d

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