Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc291ca45b3b58d…

MALICIOUS

PDF

34.5 KB Created: 2021-07-19 21:53:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53fcf1aed461b98238bdc214c0d1f736 SHA-1: af5de3061fc3aafaafaba08051d07058bfe6f69d SHA-256: 8fc291ca45b3b58d6a8414512fee8dbf6b70dc20bb1a80d684891c18de2c4733
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.tw/app/835599320/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack, which is presented as a 'free generator / game hack'. The document body and embedded links suggest a lure for users seeking free in-game currency or similar, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious.

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/free-tiktok-likes-no-human-verification-or-downloading-apps-game-hack In PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://www.tiktok.com/fypIn 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_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22588 bytes
SHA-256: 5991e7a5f8be5661008180ed09dcbe9f9d200657043a88235ef3714d2dfd3229
font_01_sfnt_off00006230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 19260 bytes
SHA-256: 26817b4cedfa85687dbcd5cd5fe0b6768af480ef1d18351329c732120202e544