Malicious PDF — malware analysis report

Static analysis result for SHA-256 f938cbc7751fa2c6…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 10:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 83478d96a9f8b578331b6c9c59c0fd42 SHA-1: 2ca54b2fa8c30091158469b56697012ef54f3d96 SHA-256: f938cbc7751fa2c65cc93bf1fcbe834bad40bdd5a211f45bf4c9ac1fc6a46021
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to piano pieces, suggesting a lure.

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://bologen.ru/strik?utm_term=first+classical+piano+pieces+to+learn PDF link annotation
    • https://cdn.sqhk.co/kamozipu/hiaghjb/67454214375.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/jJhgjeU/crazy_cars_racing_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5feb4f1c1c5b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fe939c090d90.pdfIn PDF document text
    • http://datingdate.site/35115892481folx0.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/cUuhvtI/dipifanozivojasen.pdfIn PDF document text
    • http://makeyourself.xyz/fastest_bowling_ball_speed_records1eug.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/e7bifjh/free_printable_sudoku_puzzles_medium.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/3gz0Dha/36802742881.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/pulujolatepuv/mercer_global_compensation_planning_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/cross-_platform_meaning_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/34519468399.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/remepezufedero.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/nimelugojawabimiferixema.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/hpu_m._a_date_sheet_june_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/37208330789.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/34786476393.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/please_find_more_information_below.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_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 4884 bytes
SHA-256: ddcc7f593ba180ce146088e4efbe79c8f02a2d9d32bd06d4ac04712e7d0e2aa2
font_01_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 11204 bytes
SHA-256: e1786ca8ec7012d37449b194758453ddd768843b4cb22795b32f07eca8b85ac4

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