Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1268a709b111aba…

MALICIOUS

PDF

76.1 KB Created: 2021-05-09 14:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 603646bd4b24258193cae2acaadd029c SHA-1: 7b3d3dcf419ea6f67688510017cfd3e4fda4aa71 SHA-256: f1268a709b111aba716eb5d66ce9f724be4488b1dec974f2e2a55b95bfb4c883
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary focus on https://seumenha.ru/strik, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=yes+please+amy+poehler+read+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458634/normal_60280c428db4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382629/normal_5fdc96e8de48b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420761/normal_600133d7f0233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5ffab52b26926.pdfIn PDF document text
    • https://cdn.sqhk.co/bopopujag/TJhdjaW/amazon_music_app_crashing_ios_14.pdfIn PDF document text
    • http://jojujikipafoz.iblogger.org/3d_platformer_games_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488604/normal_5fc571d88d8d7.pdfIn PDF document text
    • http://noxezef.iblogger.org/75811343696.pdfIn PDF document text
    • https://cdn.sqhk.co/xajapudoza/DhiaSjb/ragnarok_m_eternal_love_priest_skill_guide.pdfIn PDF document text
    • http://nopiwez.22web.org/opposite_words_in_english_for_class_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nobitinajed.epizy.com/alter_ego_plus_a2_livre.pdfIn PDF document text
    • http://rimutapewite.rf.gd/manifigoxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8325cf64-0d0f-4f1c-9818-687eb246d12b/how_to_deflate_an_air_mattress_with_a_pump.pdfIn PDF document text
    • http://lewalogedo.epizy.com/80687952425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca17a69-4b88-46ea-b831-d28d6a34dad3/dbx_compressor_review.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/cash_book_format_in_excel_software.pdfIn PDF document text
    • http://gegumapobok.rf.gd/gavotugudafujumuxewoni.pdfIn PDF document text
    • http://tepuxasimu.rf.gd/hibbeler_mechanics_of_materials_10th_edition_solutions.pdfIn PDF document text
    • http://ranajugupavogoj.rf.gd/color_theory_quiz_answer_key.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/integral_derivative_calculator_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecac8cd2-5f1d-433c-ac85-b961e49ff006/botawuw.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_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 5260 bytes
SHA-256: 3aff121268b6a020037d6514a382deeb1271b4260099fad1260741395e97edb0
font_01_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 10796 bytes
SHA-256: e986d9b1996b1088d098a69dc4d11d5bc6f137e43256389135cb6265ba788fb1

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