Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6a2eabda3f5656…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 16:53:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5cbf9f5f79f944546e2a00087d05cde0 SHA-1: 8a0bc2759810b77ebc406ea435fc8c7d6f82a72b SHA-256: ad6a2eabda3f56562fb26ac9f9eb7be02ae99860b44b4037e8f32ca9f26f68ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, promising free game hacks or currency. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a 'free generator' for games like Roblox, which is a common social engineering tactic to drive traffic to potentially harmful sites.

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/free-robux-real-working-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/can-you-get-roblox-on-nintendo-switch-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/is-roblox-free-on-ps3_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hacks-lua-vs-lua-c_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-hack-in-a-hacked-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/robux-hack-no-verifcation-no-suvery-no-nothing_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-clothes-hack-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/can-you-charge-robux-if-you-are-free-user_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/tiktok-free-like-app_GM835599320.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-models-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-vamprire-hunters-2-wall-hack-download_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-without-builder-club_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-avaters_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_off00003229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3229 22172 bytes
SHA-256: 1952509d5187fdbb9c5626a06052646de796c6005926c1aeaef6b23a20840739
font_01_sfnt_off0000638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 19280 bytes
SHA-256: 9945ffa193253d154cbce2906461b0c2a302f27e13cc5dbaefc5af262476b8d2

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