Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4247ed1a4305a5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 14:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba2a55dca13bb3c144a81582c233f522 SHA-1: c3b0b69a3d1db4c5a0dfc22e791e37450884eb51 SHA-256: fa4247ed1a4305a52dc25d8a3c6b9a7892783ec1cab3ddafe701ba791dc4a9f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/free-robux-gift-card-codes-2021-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead users to potentially malicious websites, likely for credential harvesting or malware delivery.

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/free-robux-gift-card-codes-2021-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/pokemon-go-free-codes-october-2021_GM1094591345.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/sign-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-hack-robot-animation-script_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-unlimitedpro-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-robux-for-free-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-things-not-model-or-decal_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-noclip-download-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-zombie-tsunami-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-cheats-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-place-copy-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-without-offers-or-surveys_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_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22668 bytes
SHA-256: 446a26d56b84cd355feb337522c33efaee4e9611006eb57c4bea8ddd17c3f649
font_01_sfnt_off00006218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 19516 bytes
SHA-256: 29e75f30c5e86761bb92b3b01e6b6c9178fe3a430d56702e6e4d31a38e0984ae

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