Malicious PDF — malware analysis report

Static analysis result for SHA-256 44be1e3f2cee7f1a…

MALICIOUS

PDF

60.5 KB Created: 2021-01-30 22:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1d89cb629cc36f4eee5b4775b1debd40 SHA-1: 777bc6331244a36d68f2fb66c57bf7c3ebeabbc4 SHA-256: 44be1e3f2cee7f1a628556e2e26c05cb40f91d10a944a0fd2ba8c90eb497d398
96 Risk Score

Malware Insights

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

The file is classified as malicious by ML and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'baarspo.ru' was extracted, indicating a likely phishing or malware distribution attempt. The PDF structure itself does not contain readable content, but the presence of an embedded URI strongly suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=d%2526d+mansion+description PDF link annotation
    • https://cdn.sqhk.co/xazururoxe/IjjhifE/real_drift_car_racing_game_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fe80479c5249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5ff4bbea8cce5.pdfIn PDF document text
    • http://vovevowumusiki.iblogger.org/zanemiseme.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/idjiBjd/12790033590.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/bUH19jf/lost_temple_survival_final_run_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5fde3d4f71fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6010d2dc7cdf2.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/ggjdvfA/big_bang_cast_priya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesekerezox.epizy.com/aphasie_transcorticale_sensorielle.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/20323556073.pdfIn PDF document text
    • http://fisejotigu.epizy.com/cardo_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/57426144084.pdfIn PDF document text
    • http://vopapatadape.epizy.com/jibupu.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/67080260451.pdfIn PDF document text
    • http://govetijedofesol.rf.gd/android_tv_box_for_sale_in_karachi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/candy_crush_saga_game_free_apk.pdfIn PDF document text
    • http://kulixuvomewono.epizy.com/google_spreadsheet_script_string_functions.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/sipumilefogefopesunopupe.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_off0000b627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB627 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off0000c454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC454 9756 bytes
SHA-256: 56e6783815c279e066558396e656a81c2f7bdc705d449264cf639336425df128

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