Malicious PDF — malware analysis report

Static analysis result for SHA-256 71bcc72513e59d7f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-09 19:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11b92c0ef0b09cfe62fde0abb66751b SHA-1: e152186441050feeb0351baf21033805968e3b0f SHA-256: 71bcc72513e59d7fc7fd6a4d946cdef6bc2f7293dccfeb60eb6baf15f025caa0
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 a suspicious domain, likely intended to trick the user into downloading a malicious payload. The document body, though heavily obfuscated, appears to be a lure related to PDF manipulation tools.

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/award?keyword=add+text+to+pdf+mac
    • https://cdn.sqhk.co/vofonowul/iiSAd9e/fuxunarosukikupeguge.pdf
    • https://zoxopabetil.weebly.com/uploads/1/3/1/1/131163737/redet.pdf
    • https://cdn.sqhk.co/belerudoxej/5OoJDMp/1752466028.pdf
    • http://zisujetev.iblogger.org/15656849411.pdf
    • http://1xbet-sportstavki.fun/93815734094w6gj1.pdf
    • http://hq-cleartv.info/takozakumina49jcr.pdf
    • http://vajemax.22web.org/moduluk.pdf
    • https://cdn.sqhk.co/xutazazo/mifui4c/crossy_road_game_download_for_android.pdf
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/tiwifivulanaf.pdf
    • https://dowixedazu.weebly.com/uploads/1/3/1/4/131409709/nimadomalojokafesofo.pdf
    • http://kukushpa.fun/bolne_wala_tota79e4b.pdf
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/c7c0d1fec2.pdf
    • https://cdn.sqhk.co/damukowabij/hUihid3/6152243706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_af631beba1364500b0bbbf4c726845f6.pdf?index=true
    • https://s3.amazonaws.com/biwuwukesazef/financial_analysis_and_reporting_manager_job_description.pdf
    • https://s3.amazonaws.com/pirofopafu/tadefu.pdf
    • http://vipowiso.epizy.com/multiplication_of_fractions_worksheets_with_answers.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_788a03765ac841a2b737fe0b0cac0dbe.pdf?index=true
    • https://s3.amazonaws.com/joterige/xiwovitiv.pdf
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_466830d134814313ae839b7e0b4ce2bc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb56.bin
dff2dcf6a13667cd93b3013f9e24cbbb9457dca2f1c115d0de0ced2d8f27abe9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 4684 bytes
font_01_sfnt_off0000fb4b.bin
b1d5f8fd45b988ca7f76521e8c123cd6da186cdc0caef889b8cd112110c25b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 10228 bytes
font_02_sfnt_off00011e62.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E62 4324 bytes