Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df3c15eed785c12…

MALICIOUS

PDF

47.0 KB Created: 2021-06-07 13:05:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a5a7c325c073e613aff0b1b50c422aaf SHA-1: 69ec83163806313b2bbe1ef4341e5a332bfd437c SHA-256: 0df3c15eed785c12c8e01e5f6adf53cb3fcecb0bd1e3c748e8baf13c1dd12638
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack'. The ML classifier also flagged this PDF as malicious. The presence of these links and the overall lure suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/robux-free-tips-apk-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-no-human-verification-survey-or-download_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-account-generator-with-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-trade-bot_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-uc-rate-in-india_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/what-is-tiktok-make-your-day_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000502b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502B 29232 bytes
SHA-256: 885914a28a07a774c512c5b0eeb1f78e03d48510121f925165f1b64a6816e9cf
font_01_sfnt_off000094ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AC 18480 bytes
SHA-256: 36bf8e0f2e23f578a604ae653c72ca291be75676deeeb4e0b1cfe9ce5c2e4394

Open this report in the interactive analyzer, or submit your own file for analysis.