Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c14fbeb370e5e3…

MALICIOUS

PDF

33.6 KB Created: 2021-06-18 03:31:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 79c93bea3db35208c92000a006f4ac38 SHA-1: 1b2275cb30c6d936d90563f3d452eb984f63e1b6 SHA-256: 77c14fbeb370e5e3c80d9574c79d89366e7b7e70f5a2deb98c75f5083609b979
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/roblox-admin-commands-hack-game-hack. The document body and embedded URLs suggest a lure for game-related cheats and currency, likely leading to further malicious content or scams. The ML classifier also strongly indicated maliciousness.

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/roblox-admin-commands-hack-game-hack In PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/como-hackear-assassin-en-roblox_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/design-it-roblox-hack_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.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_off00002ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDF 21688 bytes
SHA-256: 0f84c951d680393556a0e1db3cd27699e97bd002e740adc9d2d0858d05ff2e0e
font_01_sfnt_off00005dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD9 19208 bytes
SHA-256: dded5f548337f8b59b185572be12b715850b906660a3d3fdaae4d9e470842229

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