Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff613cd6d84cb74…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0b2e0dcebdb413de814c932a94d34a64 SHA-1: fbd825dd1b3c421ed650a459575ab0190860848f SHA-256: dff613cd6d84cb748344fcc08055426c9332b8acbccb92929122ab4eb17d8778
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 0.9865

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 https://netcdn.online/app/479516143/free-minecraft-survival-server-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pokemon-go-5-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/pubg-uc-zip-file_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-2021_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
stream_004_off00005250.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5250 26636 bytes
SHA-256: 328370b603e1ec6025dcf5ffab245828dfced74854ad0708048f4cf5e27ed4d7
font_01_sfnt_off00008ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF1 17896 bytes
SHA-256: a416ee995e2fcdad104e8f08570a8c057a7877f0093c65a8eab662d227b30cb8

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