Malicious PDF — malware analysis report

Static analysis result for SHA-256 266079efd61211da…

MALICIOUS

PDF

34.9 KB Created: 2021-05-20 12:49:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 50046f8b05c0ea1f0c1683dbd2f7ecd6 SHA-1: 985dd8b264673dd42611cb27df441fa8ab449144 SHA-256: 266079efd61211dad20aee02ed71df3e87e56432b0e165af719b670bdb5bf352
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising free items and game hacks. The document body also contains similar lures and links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/835599320/free-tiktok-views-trial-game-hack In PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CF 23936 bytes
SHA-256: d033882ccb3b1d12870ebd6701613560b3746015482a346c4f54c582538b7cc0
font_01_sfnt_off00006791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 18056 bytes
SHA-256: e0f5149f099f9bf1ac81ae109a6f3e331ce3f0e28429fffdc236381c75b9df70

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