Malicious PDF — malware analysis report

Static analysis result for SHA-256 f893ccab45b08573…

MALICIOUS

PDF

70.8 KB Created: 2021-02-12 21:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a86cf951e32f2e1d7de45927321a193d SHA-1: 530074f4289b06c155335ee02e786e50764f27d0 SHA-256: f893ccab45b08573bea43a1e0b4b4fa5187ca490759a0847f08fa40b3f4565fb
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'seumenha.ru'. The PDF structure and embedded content suggest it's designed to exploit users by directing them to potentially harmful websites, likely for phishing or malware delivery.

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://seumenha.ru/wix?keyword=defend+the+house+3 PDF link annotation
    • http://dalovujunaguk.22web.org/granny_mod_apk_invisible.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5ff0d3415078e.pdfIn PDF document text
    • http://jizefuli.22web.org/hey_soul_sister_trombone_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496811/normal_5ff9178f6d2d3.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/jerCojg/katexafurajibufa.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/abCYjiz/3d_home_design_online_easy_to_use.pdfIn PDF document text
    • http://vokegitejupud.iblogger.org/maludimimirolik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458616/normal_60035ec9cabf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://timavutiziv.epizy.com/amablesser_cover_song.pdfIn PDF document text
    • http://miloxirabufa.epizy.com/79727671240.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/ap_world_history_practice_test_answers.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/aamir_khan_dangal_movie.pdfIn PDF document text
    • http://girifej.epizy.com/bapibi.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/21425203309.pdfIn PDF document text
    • http://bajivuselome.epizy.com/86858889805.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/xodumesideragulo.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/uglydolls_parent_guide.pdfIn PDF document text
    • http://dojovosis.rf.gd/guzamugowivelaxanaxadug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 4652 bytes
SHA-256: 9716b80945221f1319fea53bc283a885a58735cd700fe99b291f4cea7505bf23
font_01_sfnt_off0000de21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE21 9928 bytes
SHA-256: f9cf1c1553eee53dcc89da421a747a68cb68a924b10f63b1ca044cc678715acf
font_02_sfnt_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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