Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbbcf897974b9b9…

MALICIOUS

PDF

35.2 KB Created: 2021-07-23 18:53:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96eece9d5626910fec12dc085e423dab SHA-1: e21884874caf11c2e66f9838f691044b4846c494 SHA-256: fdbbcf897974b9b9b29c3cd2a5eaa13caafa13d9eb38c9ed372b2f67a94d0de3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free generators' or 'hacks' for popular games, which is a common lure for phishing or scam operations. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically identifies a link to a known malicious redirector. While no scripts were extracted, the document body and heuristics strongly suggest a social engineering attack designed to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9294

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 http://netcdn.tw/app/431946152/free-100-robux-game-hack In PDF document text
    • http://kfz-service-etp.de/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://kfz-service-etp.de/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://kfz-service-etp.de/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://kfz-service-etp.de/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://kfz-service-etp.de/images/how-to-hack-roblox_GM431946152.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
font_00_sfnt_off000029c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C9 21904 bytes
SHA-256: c7d9df4710f60cfba1b716c42771012d009cbdfb25a124a424625a9bdb622126
font_01_sfnt_off00005a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2B 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000066d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D2 18480 bytes
SHA-256: 2e8babd173c71692d2fd24d125b7c6b3ae0e638c4d6eb59ea11203273ffa3d43