Malicious PDF — malware analysis report

Static analysis result for SHA-256 b179a47256db97fd…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 10:53:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 664a6582b6eba32d4bacf10f8f6cf509 SHA-1: 85d6e2dc782c3e9426bfbf41a549a79a638e1add SHA-256: b179a47256db97fdd9f4b15ceded74ff6c2708c5ececa3aaac05bdac364784cc
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/if-i-uninstall-minecraft-can-i-reinstall-it-for-free-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-apk-free-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robuxtool-com-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-full-lua-executor-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-best-looking-free-avatar_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-no-hack-pc_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-gift-card-free-no-human-very-or-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-gravity-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-in-5-seconds_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-games-at-roblox-2_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-gamepass-roblox-script-not-patched_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/where-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/lazyblocks-com-free-robux_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_off0000348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348C 22500 bytes
SHA-256: a5c798213a0b091e1899b97f05d0c66597bd40e22358bacabcfc16cc70e21f81
font_01_sfnt_off0000665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665F 18256 bytes
SHA-256: b2bf55620d3aece649c5d16599f91d12208ed2936f8f1c8db51d26c9d16504e4

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