Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac397351798969c5…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 06:25:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66e2ed08a155ef036a57341986671915 SHA-1: 09c390a5adc89b3122ac3a6ef2eb2dea466bc139 SHA-256: ac397351798969c5648885787155f532a063d3ac2c5ce0346aaa4cd000cbf63d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' and 'robux generators' to lure victims. The document body, though partially corrupted, contains references to these lures and embedded URLs. The primary malicious action observed is the redirection to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/games-that-you-play-for-free-robux-game-hack In PDF document text
    • http://ltmphoto.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ltmphoto.com/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://ltmphoto.com/images/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E7A 26624 bytes
SHA-256: c753fa916b5d6969bf232977f593ab18d1b3627a459568569273574495fbd8e5
font_01_sfnt_off00008b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B90 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off000098b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B6 19340 bytes
SHA-256: 0436c11e71fb545ce4c7e8470616870eacc0a69bd1608b70ea6108838b44ebea

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