Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ea424bcf2436a6…

MALICIOUS

PDF

76.5 KB Created: 2021-02-07 19:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 100c3f686a23aeaecb9dc5dfb579abae SHA-1: 7f6ef1cedae4e7e31e3d8707d7739bb0d19f8ac3 SHA-256: 44ea424bcf2436a6ba2263e500473592e9ec597da92feb6a1d90a5f6a2d57d3a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'seumenha.ru', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to 'El feudalismo julio valdeon pdf', further supporting a social engineering pretext.

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://seumenha.ru/aws?utm_term=el+feudalismo+julio+valdeon+pdf PDF link annotation
    • http://zelopaqq.xyz/ziretosizuprkeoc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_60150d6ac4abc.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hdveaLK/living_a_boy_s_adventure_tale_chords.pdfIn PDF document text
    • http://prod-fruit.space/250778394424b0lt.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/fh6hahV/basafofuzovin.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/jh8thgF/ria_money_transfer_online_registration.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_5fd2d40fa91d5.pdfIn PDF document text
    • http://reetodo.online/wdamage_car_crash_engine_downloada9k41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_600d1cea7d342.pdfIn PDF document text
    • http://pristav.pro/suwofujidouca8.pdfIn PDF document text
    • http://zoomita.space/alphabet_phontique_internationalv9lz6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/87822642753.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/37076008545.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/clark_rubber_foam_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/afghan_jalebi_song_dance_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/khiladi_bengali_movie_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/music_theory_cheat_sheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/motinubi.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_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 5184 bytes
SHA-256: 544fd5023a4eb9ce9fedb9d7e98285fae71a9fcf386876c7f12d745e5d425911
font_01_sfnt_off0000fe90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE90 11644 bytes
SHA-256: 938f6dd14d03416546f91821d43ee62748111dd4b8d8d45167d8e37b05111f65

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