Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fb56ef1666fd37…

MALICIOUS

PDF

103.4 KB Created: 2021-03-15 20:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 193abb862ec5400f60fcd27272b13d0e SHA-1: d186f49f0fad19e517e529ce8bc36db0a8b5866d SHA-256: 75fb56ef1666fd37fec8187119e168d4be1d0a20e0c14171e42aceae0480165a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm attacks to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/wix?keyword=monkey+madness+2+quest+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372985/normal_603c1654d43f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_604cdac55155b.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/hbSZjcR/shadow_battle_2._2_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/Pbgdjfy/facebook_ads_design_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/hco5Phg/chinese_checkers_2_player_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/ifibVjj/93889151238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479923/normal_60404ec772714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_603419497a164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_600153a8225b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_6016a513b6f36.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/hBHMFje/6_infinity_stones_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_603f015de7c1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fe1cf6964a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490516/normal_5fdc8af291751.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/heyyHgc/packers_bears_2019_stats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_498786302f8749c9af4c0615413849d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46661d0-243d-47e2-b98c-2df6a395558b/como_saber_se_terminar_um_namoro.pdfIn PDF document text
    • https://66f9544f-8325-470d-a543-c07714603334.filesusr.com/ugd/4b2642_939bf9e49f0f4d66b17c059e15e13607.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1237e548-60e1-45e4-b181-c6b3a1d7175a/41713619915.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_e578a4fa498842409b8684b9d6ea7d31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8789810d-8c7f-4717-a813-1566529ba486/dwarf_fortress_release_date_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b6cebf-540d-404f-a5d7-6945aa73c20e/pinojudagope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6d0de7-1928-4179-a3eb-6bff02eec1c6/sokejikakijojod.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_off00015768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15768 5444 bytes
SHA-256: d75470c27c8d90e19469747d6c6ecc9de01972f1dac20fee2361bc07968bac56
font_01_sfnt_off000169f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F7 11280 bytes
SHA-256: 362e14871bc2616a719f3be42c394836ed30cc42bb257bea4956996b74f8ac05

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