Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4aab5659171df39…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 11:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab11e4ccc5c036efa7238eae45896b8c SHA-1: be908b232f229ab7f50f819f6211eb6126cd5eea SHA-256: c4aab5659171df39f898c458b4c1367ab12d6653a10511f91675a945bdf04b70
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 redirectors, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/479516143/minecraft-for-chromebook-free-game-hack. The presence of a visual download button further supports the lure tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/minecraft-for-chromebook-free-game-hack In PDF document text
    • https://proviant.kz/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://proviant.kz/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://proviant.kz/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://proviant.kz/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://proviant.kz/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://proviant.kz/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://proviant.kz/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://proviant.kz/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://proviant.kz/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://proviant.kz/images/is-minecraft-dungeons-free_GM479516143.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_off00002ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC6 21924 bytes
SHA-256: efb07900c7a896476c5cf5cea9aeab6635320c01f14494a3dc9f24fbd181da30
font_01_sfnt_off00005b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 18464 bytes
SHA-256: 2a1fd25b60091da4e89f293bc06fa32417487358dc39e20cf321c71e22d0bfdc