Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4e8fcdcc5872b1…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 01:01:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7fc8077cc96270b3c92407ca2c052443 SHA-1: 39c4868d531f1ad343ae9032c27a6df86225e986 SHA-256: 1f4e8fcdcc5872b1071977e63151914aa04c47300661e3c7c23309e7ab434fb1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that are disguised as game hacks and generators for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/roblox-number-for-free-robux-game-hack, is flagged as a lure for game hacks. This suggests the document's purpose is to trick users into visiting malicious sites, likely for credential harvesting or to download further malware. No scripts were extracted, but the PDF structure and embedded URIs indicate a social engineering attack.

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.co/app/431946152/roblox-number-for-free-robux-game-hack PDF link annotation
    • http://digilib.akperkabpurworejo.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/cheat-roblox-avoir-de-largent_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-on-roblox-games_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-2021-not-patched_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/bloxy-world-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/free-skin-on-strucid-in-roblox-how-to-get-i_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/hack-para-tener-robux-en-el-movil_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/hack-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/hacks-para-roblox-windows-10_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-reedeem-codes_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-group-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_off0000308e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308E 22380 bytes
SHA-256: 474a29f05a85d2d55820de2d60edaec5e6c6bc26d4947a4728f551c8044f448b
font_01_sfnt_off00006201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6201 19052 bytes
SHA-256: 14837b3d232cad4c0d2d1188e5f6ac918a894da6276050ac074c7580d9c8c928

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