Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12722c93dfc2448…

MALICIOUS

PDF

72.6 KB Created: 2021-03-16 06:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fa9d7f41fd761797de9af2a60f28f20 SHA-1: d8544aec3b87e721e5f7fe06f62364818ea753c9 SHA-256: d12722c93dfc24488d8a27208de8b598f26b65c847bf989b17b42aa695ed2831
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'bologen.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as 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/123?utm_term=lagu+boney+m+bahama+mama
    • https://cdn.sqhk.co/vadavenaw/juhQjbW/8156500702.pdf
    • https://cdn.sqhk.co/mobirewin/didk7ic/pupokuvokujezamanulef.pdf
    • http://dosijefa.mypressonline.com/xupupoduwipafopuzumojun.pdf
    • https://cdn.sqhk.co/zufutetuwume/bogejaq/45741528302.pdf
    • https://cdn.sqhk.co/fafujedajir/iaTOWgi/3374892511.pdf
    • https://cdn.sqhk.co/geruxibab/cjdifpJ/keromojumimim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9404382c-49d7-45e0-b6ff-6e1ba8827520/brother_lc101_printer_scanner.pdf
    • https://uploads.strikinglycdn.com/files/1a929526-1c78-4279-8d2c-c418eaeeb22b/dias_festivos_en_estados_unidos_septiembre.pdf
    • http://nibizuladode.onlinewebshop.net/lyrics_bts__love_yourself__her_serendipity_come.pdf
    • https://s3.amazonaws.com/daniwodug/when_will_euphoria_season_2_be_on_hbo_max.pdf
    • https://uploads.strikinglycdn.com/files/78ebec1e-dbd5-4a55-919d-2c17c278f1be/mowutawarepaju.pdf
    • https://uploads.strikinglycdn.com/files/6c234f84-1b79-4391-a3b5-47852aec2e37/how_do_i_love_thee_theme.pdf
    • https://s3.amazonaws.com/susonanezaj/aurora_co_police_department_accident_report.pdf
    • https://s3.amazonaws.com/vazisi/44653674082.pdf
    • https://uploads.strikinglycdn.com/files/9b2f1500-1d48-4c57-b717-18c3ad10c2e9/why_does_my_bose_soundlink_keep_turning_off.pdf
    • https://s3.amazonaws.com/daniwodug/87938579033.pdf
    • https://s3.amazonaws.com/zugutixe/jaxulalesukogorotizuk.pdf
    • https://uploads.strikinglycdn.com/files/54e959d0-2c8b-41ee-82f3-a33be7aaa20d/96875743090.pdf
    • 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_off0000cee9.bin
1704f42b34852521958567e4b80fa4bd2f69b338d05c0d83625ca593fdf13766
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 3828 bytes
font_01_sfnt_off0000dca6.bin
ee82c86a5b08977bbfe77bd3cb5435a268d195729360a2d578de70667622fcd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 4976 bytes
font_02_sfnt_off0000ed81.bin
0e71d867da438945811411d6dcd5c4a4d8e7c0972f3495aa746be72fafa60fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 12284 bytes