Malicious PDF — malware analysis report

Static analysis result for SHA-256 df638ab995fe1c1c…

MALICIOUS

PDF

36.6 KB Created: 2021-05-21 09:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 114b55a51279ab71645612e308b7e82a SHA-1: 3114124224f4526efb6bbb78248bc5af8a05f9d0 SHA-256: df638ab995fe1c1ccf179fba2d772e256730c5624c523aa6f18e815bbd8be8fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and a call-to-action lure related to 'free generator / game hack' and 'free TikTok followers'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged the document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-tiktok-followers-without-downloading-apps-game-hack In PDF document text
    • http://federcaccianucleomagenta.it/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://federcaccianucleomagenta.it/images/robux-hacks-2021_GM431946152.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_002_off0000367d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x367D 23324 bytes
SHA-256: 8abe8aa6a055c6fc3013ea9bf712825e2ddc5a44b47202f2568895b8cf021f3a
font_01_sfnt_off00006b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 19232 bytes
SHA-256: 559d1412019707626c7f528927429326142765f2e6c999121016973eac31c5cc

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