Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42bee0a811b5db7…

MALICIOUS

PDF

70.7 KB Created: 2021-02-02 16:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 59053505f34be62d8667e176a0639ad3 SHA-1: a9edcf85a2bd393e025b64ba253a02bb4b0565f5 SHA-256: f42bee0a811b5db7fd87b2ea41d0a491abffb40319288fb0647ba6452be5c873
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'free gold bars' and a game, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=free+gold+bars+candy+crush+saga PDF link annotation
    • http://wasukowoko.iblogger.org/police_bharti_bandsman_information.pdfIn PDF document text
    • http://qlemelest.online/sunututo57al.pdfIn PDF document text
    • http://klosheff.xyz/homestead_act_of_1862_worksheet_answbet24.pdfIn PDF document text
    • http://detonic-official.website/english_reading_practice_passagesl2ax0.pdfIn PDF document text
    • http://freshnatur.fun/nadetoguzenidizuxorefabpllv.pdfIn PDF document text
    • http://dekagexagupeje.iblogger.org/deduwasusijojuvuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowutafamewuben.rf.gd/samsung_ssd_860_evo_performance_benchmark.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/84115573780.pdfIn PDF document text
    • http://ninonasoligu.rf.gd/fasivimogurugiwafiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/beautiful_hd_pictures.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/24061879301.pdfIn PDF document text
    • http://zipoxibel.epizy.com/79623824471.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/2015_bmw_x3_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/hatikvah_clarinet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/audio_editing_software_for_pc.pdfIn PDF document text
    • http://lifugefumiwikoz.epizy.com/mapa_mundi_paises_e_capitais.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/24825143793.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/the_cabinet_of_dr_caligari_1920.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/9016604380.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_off0000d626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD626 5400 bytes
SHA-256: e806cbd16d3780c936155ca9a1f0a22039b8fb3261970a1d3d86629e565c0054
font_01_sfnt_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 11008 bytes
SHA-256: 538650e90c54c96400ad2fc0e9589189458e27362f77c1cb538db83e900c41ad

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