Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5f27a8af7487d0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 19:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 89d95e6004d3cda12072ab2933c23ee8 SHA-1: 9593b948189cb2b3efc57f602f6605bcb7bb4f14 SHA-256: 8f5f27a8af7487d08896ca565d7859107fd8dfa331fec5cd90dae9d5d20e7272
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.tw/app/406889139/coin-master-invite-friends-hack-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/getting-tons-of-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cheats-for-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/fencing-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-100-working-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-hate_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-glitch_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
stream_002_off0000316d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316D 22656 bytes
SHA-256: e15ffe2a1c6dfcc6fbf7149b829c4c1320b5826cf012cf2f5f703bcfd69062fd
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 18456 bytes
SHA-256: a26d5737dc3e5e06b02edf808e6094a365cb44a0ead87865d2f9109774260649

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