Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c04b2c1362abc0…

MALICIOUS

PDF

33.8 KB Created: 2021-07-21 03:44:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1b0089032f603d6924e2fda69bca79e SHA-1: 1681d25f085944965f801def6bd1a2252b288e94 SHA-256: 33c04b2c1362abc049fd801fd61447cc4716bb72888b6526335aabe10c62b31a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, masquerading as a generator for game currency and hacks. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure, and the ML classifier strongly flagged it as malicious. While no scripts were explicitly extracted, the document's structure and embedded links suggest it is designed to lure users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/406889139/coin-master-free-spins-link-today-instagram-game-hack In PDF document text
    • http://www.reikiusui.it/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.reikiusui.it/images/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://www.reikiusui.it/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.reikiusui.it/images/rbx-free-robux_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_off00002bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFD 23044 bytes
SHA-256: 055dd01fb5399588511b44bd9ea4b696a09bb24d86d5d696060ad90762d4a9f4
font_01_sfnt_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3