Malicious PDF — malware analysis report

Static analysis result for SHA-256 1319a566ed623c87…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 14:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ac46496c8b416d458af39aedae85c2fc SHA-1: 5a9e82e7be83d7723e6cfc1aa967c97859c29e33 SHA-256: 1319a566ed623c87dea80b9784e816aba6e097e21b43ee56a329c8b63ef3239d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-us-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/all-free-roblox-hats_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-robux-hack-xbox-one_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/set-you-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/working-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/f-r-e-e-that-spells-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-cheat-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-hammer-tool-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/counter-blox-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-with-cheat-engine-63-2021_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_off00002e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E59 22372 bytes
SHA-256: d58a1313248a16edd6a24a4c027b9f809ce27d43db1724ef3a94210be39bfe1b
font_01_sfnt_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 18884 bytes
SHA-256: bfc674629a4fdfc233a3c1a19cbee54387e60bd0cdfc4a3107778b42d9fa82d8

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