Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e14f3acab5dba6…

MALICIOUS

PDF

72.6 KB Created: 2021-03-21 10:44:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7902ff9c9a4f0549462f77bd20a1e1 SHA-1: e5e8061b5fdcee370f6715a50cf42176ddd924cb SHA-256: c2e14f3acab5dba6d44c150d6dacee4fb2971e16357c96add5122c80f7c3606f
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 'kuzutuzo.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, appears to contain text related to a school schedule, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=east+river+high+school+wednesday+bell+schedule
    • https://boxenujevodaziw.weebly.com/uploads/1/3/1/0/131070305/420728.pdf
    • https://cdn-cms.f-static.net/uploads/4470226/normal_60396348ec717.pdf
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/tuxijasofosube.pdf
    • http://prequester.online/cuantos_pactos_hizo_dios_con_el_hombre_en_la_bibliaj0h1k.pdf
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fff6105efdd3.pdf
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/6064cb0d.pdf
    • http://fortuneo.biz/50842185614ni3fr.pdf
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5ff220ad6d217.pdf
    • https://cdn-cms.f-static.net/uploads/4504568/normal_605416867bc15.pdf
    • http://arm-watch3.club/2463599089219xb9.pdf
    • https://zesalefol.weebly.com/uploads/1/3/5/9/135994098/sinobov_fotusezobis_porux.pdf
    • https://cdn-cms.f-static.net/uploads/4425211/normal_60461fb08cb50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ninunebuxidumeg.epizy.com/whatsapp_status_video_app_name.pdf
    • http://larazegabolulaf.epizy.com/bobupimanalesamev.pdf
    • http://duginefasozuna.rf.gd/resuwizabuseluxu.pdf
    • https://s3.amazonaws.com/lepefi/78805018825.pdf
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_484cc7d1ceb442acb2fd3a422471112f.pdf?index=true
    • https://s3.amazonaws.com/pewibim/git_flow_command_line_cheat_sheet.pdf
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_eeb2b7cc03014f7b82dbd618ee0ad558.pdf?index=true
    • https://s3.amazonaws.com/bojafazes/toxufuj.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_off0000ccaa.bin
9e0e4b4c58036d0af48b0683ff9494ed60ac447f819d90bb91615b7fe4986f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAA 5432 bytes
font_01_sfnt_off0000df30.bin
d99396a2259de21207c62760a60a550548c6468fc3b3e61282adbcf53858716f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 11208 bytes
font_02_sfnt_off000104f0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 4324 bytes