Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ead3db8870db5d…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 10:09:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d177be36187ec428854db8947f15719e SHA-1: 3eefac956d072b22b6d38a4a9fe1ad1ff7c95c8a SHA-256: f9ead3db8870db5dbc330e73751576df8df68a7654b1761582332600b4eb2de5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The document contains multiple embedded URLs, including one pointing to a known malicious redirector, which likely serves to deliver a secondary payload or lead the user to a phishing site. The ML classifier strongly indicated maliciousness, and the heuristics confirm the use of redirection and lure tactics.

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.co/app/431946152/cheats-roblox-highschool-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-weapon-cheat-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-774-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/creator-of-slx-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/comment-avoir-des-robux-gratuitement-sans-etre-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/a-free-trial-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hacking-into-a-roblox-playler-account-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/ads-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/los-hacker-de-roblox-mas-peligrosos_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-dantdm-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-115-2-hacks_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_off00002e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E50 22608 bytes
SHA-256: 46d273ca3936933d1c45dbe24d04a9fc8edbec929e431e91ed1bb89e0a683158
font_01_sfnt_off000060bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 18876 bytes
SHA-256: 133badf042d1f09072e0f58eea7d0a9c3b4f091423614fd4caed0944badf24be

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