Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bbc4b54dd8979a…

MALICIOUS

PDF

34.7 KB Created: 2021-05-21 20:39:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4545ff6e242551a9ad4342689a1fd95 SHA-1: 523ac0e86855dd35fcb70d58f8483ea1e8a59073 SHA-256: 54bbc4b54dd8979ab90fc830d2d1ca21161e98f1fbec4f354c20a28892d4e10f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free generators' and 'game hacks', which are common lures for phishing or malware distribution. The document body explicitly mentions 'How To Get Free Tiktok Followers Without Human Verification' and includes a 'CLICK HERE TO ACCESS TIKTOK GENERATOR' call to action, reinforcing the deceptive nature of the content. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9505

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-human-verification-game-hack In PDF document text
    • http://stroyproekzia.ru/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-get-free-robux-without-paying_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
font_00_sfnt_off00002df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF5 23924 bytes
SHA-256: 695254a7dc22b63b3ae0eb6399e0ae1ae222be27e17302da25ba4459f41b1a63
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 18820 bytes
SHA-256: 79c2bf02bc82707ab9f25b25786afb4a3e11e0d45a314ed7c066e7684dd6d9fe

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