Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bed060e66b1b70…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 23:21:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e3ce9625b5844b6abd31018c8841972 SHA-1: eadb7c7d41d808353f2f505400223d8258105bed SHA-256: 91bed060e66b1b7048e982779516b97aca1a363f897db958fe437e17a3ecb348
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'robux hack me' and 'game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/robux-hack-me-game-hack, which is flagged as malicious. The document body and embedded links suggest a social engineering attempt to trick users into downloading further malicious content. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or malware distribution attempt.

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/431946152/robux-hack-me-game-hack In PDF document text
    • https://techmobil.pl/images/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://techmobil.pl/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://techmobil.pl/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://techmobil.pl/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://techmobil.pl/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://techmobil.pl/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://techmobil.pl/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://techmobil.pl/images/play-minecraft-online-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_off0000287c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x287C 22804 bytes
SHA-256: 08faa5a7c5d42298766c37e87b28a9530d1e3572066f19253c65477bbbb6c3a8
font_01_sfnt_off00005baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAF 18632 bytes
SHA-256: c8da56bbbb3df747cf2213435dde956968f4dc6fc6a1da517dd961d035af3807