Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cf584020596876…

MALICIOUS

PDF

83.8 KB Created: 2021-02-24 03:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dff78ea9c6ae05e0df38757745d8472 SHA-1: d26e369fb80da0bc74883bdc05a6892cb7a45f1d SHA-256: 97cf58402059687605f7300f9cb873202602b5bc1ab43ba45ad4cd906ec0dec1
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'seumenha.ru', which is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing attack designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=staurikosaurus+dino+hunter
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5ff19320a738c.pdf
    • https://cdn.sqhk.co/setewefasari/JigEIqM/khan_academy_mcat_prep_notes.pdf
    • http://tiwigibafofovit.iblogger.org/58155977276.pdf
    • https://cdn.sqhk.co/xixofivib/jshiShi/wegore.pdf
    • https://cdn.sqhk.co/nemazuwigumo/ibdggii/gas_meter_reading_crossword.pdf
    • http://laxuribotu.iblogger.org/91293003996.pdf
    • https://static.s123-cdn-static.com/uploads/4479933/normal_60014862a87dc.pdf
    • https://static.s123-cdn-static.com/uploads/4376874/normal_5ff1fc5dcc5c8.pdf
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5ff289da60aeb.pdf
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fd23568f09b6.pdf
    • https://static.s123-cdn-static.com/uploads/4403556/normal_5ffed3319ba54.pdf
    • https://cdn.sqhk.co/nilesatu/Sgc2fhj/beach_buggy_car_racing_game.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fuzafuzeruwit/69486352138.pdf
    • https://s3.amazonaws.com/sefiwegegagu/libros_de_instrumentacion_quirurgica_gratis.pdf
    • https://s3.amazonaws.com/sazixipame/zebiwusada.pdf
    • https://s3.amazonaws.com/rujabepifar/28082392156.pdf
    • https://s3.amazonaws.com/limepusotanal/4020119036.pdf
    • https://s3.amazonaws.com/magapeguwabe/how_to_program_4_button_garage_remote.pdf
    • http://nufolupi.epizy.com/88817727623.pdf
    • http://xopidevuk.rf.gd/burifibivekezoguduxazugo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010346.bin
35c16e96535f1025eaa8986e2dbd4a9dbb025ca783c799e57747c666038e17f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 5048 bytes
font_01_sfnt_off0001145b.bin
b744d20329a21ba1921c870a4deaacb4064f710d75eb1a58e31c0067c31195cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 1716 bytes
font_02_sfnt_off00011d01.bin
6c29d4c536f5ed8ee0c77ee01ec6d6900a7e4bc60237b2c18f79a7696c0f5882
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D01 10200 bytes