Malicious PDF — malware analysis report

Static analysis result for SHA-256 54944ce2cd9a7c41…

MALICIOUS

PDF

98.2 KB Created: 2021-02-15 10:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 25000474572259c41d5db5c0d76d9150 SHA-1: 4446e7999b75b4e8207dd8dd79eaeeed3c7a6161 SHA-256: 54944ce2cd9a7c41cfd7596af8ddf182b35b83280c96fc59ad5c7d145fc2d0ca
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 'https://maypoin.ru/strik?utm_term=the+cat+in+the+hat+book+cover', which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to 'The cat in the hat book cover'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=the+cat+in+the+hat+book+cover PDF link annotation
    • http://in-step.shop/tefebazebemelux147ua.pdfIn PDF document text
    • http://itchia.space/diwelojivisurobolonuzur7hlb.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/avakin_life_hack_tool_no_verificationt2vwb.pdfIn PDF document text
    • http://zoomita.fun/pycharm_cheat_sheet_mac59fou.pdfIn PDF document text
    • http://gogotmif.space/summertime_alto_sax_sheet_musicqp2xb.pdfIn PDF document text
    • http://matras-24.ru/druid_spells_5em1odh.pdfIn PDF document text
    • http://murerejomijuv.22web.org/tree_brushes_for_photoshop_cc_free.pdfIn PDF document text
    • http://idealica-italiauficiale.website/53296672950ci5qd.pdfIn PDF document text
    • http://topmassage.net/10897714718ywbbf.pdfIn PDF document text
    • http://pmaider.com/nakamichi_sound_barwwo85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wujitotulofok.rf.gd/lalupizuwizevevar.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/new_bhojpuri_movie_sangharsh_2019.pdfIn PDF document text
    • http://gipizaz.rf.gd/animated_christmas_powerpoint_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/dafefi.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/baby_love_you_english_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/calendario_2020_madrid.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/99333236503.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/fodakolapitifamarumat.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/tirezilalomexibar.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_off00014221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14221 4888 bytes
SHA-256: 06e487b61444f337eb46ad115962c1691cec0e468b5445602d98266cdc3be0f6
font_01_sfnt_off000152c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C6 12352 bytes
SHA-256: a28c5f0dfea8e63d0f45fd2246a0ab99f9891a444922d6e5967c6760a0317d34

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