Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c2429d51882056…

MALICIOUS

PDF

34.3 KB Created: 2021-07-19 05:25:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 158a1ff99488722ac01fd14364527237 SHA-1: 5252bfc67b864481fec559b3486f6d2a0feafa6d SHA-256: 16c2429d51882056d32b1ef8c9f18ababdb667604d37f4a331cd7ad18b92c554
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular platforms. The primary lure URL is http://netcdn.tw/app/835599320/how-to-get-followers-on-tiktok-for-free-game-hack. The document body also contains numerous other links to potentially malicious PDF files hosted on beaksandpawsfl.com, suggesting a chain of redirects or further malicious content delivery. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/835599320/how-to-get-followers-on-tiktok-for-free-game-hack In PDF document text
    • http://beaksandpawsfl.com/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://beaksandpawsfl.com/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.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
font_00_sfnt_off000033bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BB 22608 bytes
SHA-256: 0bc2ec0bd2d596b3669202799542f23f95e9d4fb57fdc56cce9d60030d52b27b
font_01_sfnt_off000065e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E2 17692 bytes
SHA-256: b635499a4f9fb6d9e8967cb3fdd5afd49967982b90c247824071efdea06cfe8e

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