Malicious PDF — malware analysis report

Static analysis result for SHA-256 2172982c3d0df2bf…

MALICIOUS

PDF

72.8 KB Created: 2021-02-23 04:30:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0288f769fbdae95c195e969ffdc56afd SHA-1: 05b864be642570517fc9f9aa2683613c1c1cf0df SHA-256: 2172982c3d0df2bf381246b24ff4aae3e2b13e0a67b4730f061de28456ff4aab
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document was flagged by multiple high-risk heuristics, including a remote support tool lure and a password-protected archive lure, indicating a phishing or social engineering attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a suspicious domain, likely serving as a download source for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://druttle.ru/strik?utm_term=how+to+use+singer+heavy+duty+sewing+machine+4423 PDF link annotation
    • https://cdn.sqhk.co/guxuboru/ClggJY7/teamviewer_quicksupport_download_play_store.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/hj24lig/tanaduzapigeroxoxe.pdfIn PDF document text
    • http://kelnoteres.xyz/purorurir92bhh.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/fosagoba/xekipel.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/cat_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/xulune.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/carry_on_jatta_2_gippy_grewal.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/chrysler_crossfire_2005_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/bmw_225xe_iperformance_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/biography_template_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/28926172120.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/kaputatad.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/zanuvazik.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/demon.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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 5920 bytes
SHA-256: 85e9f3aa121755842cc64f01931fff7ee3f6e81097e90b7948e29fab87652990
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10244 bytes
SHA-256: 900731d0253576889efa8c0d6c50095b811e76912cf677d172e34426e43cd90e

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