Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f36d44bfb42403f…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 17:56:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 43c60b9ca3aed41e95e4a4a0ae3d376e SHA-1: 81e5bfadba61dbe25b5c9fa42477f13d7a32a190 SHA-256: 6f36d44bfb42403f26b89badc79688332a95c9ef0afe78fe7defea750765343d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, embedding multiple links to known malicious redirector infrastructure. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-promo-codes-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely using embedded JavaScript for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-promo-codes-free-robux-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-promo_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-cheats-no-survey_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-kaufen_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-autoclicker-for-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-furk-blocburg-cheat_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-skin-creator-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-no-verificaton-robux-cards_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/pet-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/descargar-hack-robux-gratis_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-jackets-on-roblox_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_off00002c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C76 21740 bytes
SHA-256: 8a6321294068a01adc2e17fed04a32d79b78c75681dff664fb67cd453a1ea1e7
font_01_sfnt_off00005c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 19380 bytes
SHA-256: f599988ad614928277529a5070f43d57f30efd84bc389ab6e612c4c8b358aa39

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