Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5bf57d0d4886ba…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 05:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2affc1765af8e0ee6b400825a208f701 SHA-1: 18abf2f14b76902ec2e8b67a119729ad866d2123 SHA-256: 3b5bf57d0d4886baf250bb0886d0b4da70166a24aa08b6c3b7b26ca9b718381b
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.co/app/431946152/escape-room-by-devultra-cheats-roblox-forest-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-shinobi-life-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-blood-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-download-prison-life_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-instalar-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-scripter_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hacks-for-roblox-island-royale_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_off00003017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 22312 bytes
SHA-256: a2e435f88c2689ebc6a6bec54bac44a2b50f4ed64b01aeca1f6553dbc85f8c3b
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 19960 bytes
SHA-256: a7b32a2e8e09fea0aede29f505dc34c5931d862abb0a9e7807ac8161dc40651c

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