Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32c295f70092636…

MALICIOUS

PDF

82.6 KB Created: 2021-02-27 03:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 981e33d7645c6c3b2566753e994aa326 SHA-1: d6902dfdc3837d78621a2d1831442e2f480964ef SHA-256: b32c295f70092636b1ad616b1dc47caee0df4a1ab1a3b7be5f738bd702d63df1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains text fragments that may have been intended to deceive the user into clicking the 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://midufefew.ru/123?utm_term=you+before+me+watch+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6028febe6c9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_6037de5a5c696.pdfIn PDF document text
    • http://wurigakisedepov.iblogger.org/36683728763.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/9gg6jgK/worldcraft_premium_3d_build_craft_online.pdfIn PDF document text
    • http://sizegivip.22web.org/calculer_augmentation_pourcentage_formule.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/que_harias_si_no_tuvieras_miedo_curso_online.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/how_to_program_chamberlain_garage_door_opener_keypad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fc605e84d88e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumamuv.myartsonline.com/samsung_galaxy_note_3_neo_price_in_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/4190173211.pdfIn PDF document text
    • http://pigozezidum.rf.gd/songs_sound_of_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/23491103382.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/voluwizunevudi.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/korubuzupu.pdfIn PDF document text
    • http://sumojoripira.rf.gd/is_hail_damage_reported_on_carfax.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_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 5136 bytes
SHA-256: a3c62daf38a5115f327ccfb544299ae165f09d18877758fadf6c79e84484b3c7
font_01_sfnt_off000117bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BD 11160 bytes
SHA-256: e5f8e7a402fb6a592bcdf1a47b73fb4629148a2223436de5412e20ae4ff5a64f

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