Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcb0736efef6c33…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 23:43:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 692f704f029bb66a9be6d8c4b872c6a7 SHA-1: 124f9c52ba996ddeba40b05574ca3404d4896dc7 SHA-256: ddcb0736efef6c33d2c0c052c3dca8ef3b4ed32dce7feb6a27e6b7d9545ce2b5
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/hack-para-tener-robux-en-roblox-2021-game-hack PDF link annotation
    • https://digilib.akperkabpurworejo.ac.id/repository/roblox-clothes-maker-free_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/new-free-roblox-shirys_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-roblox-cards-for-100_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-catalog-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-roblox-clothes-website_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coolkid-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/coolest-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/stickmasterluke-free-robux-game-link_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-generator-com_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_off00002f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F04 21736 bytes
SHA-256: 9ec133d16fed063aa1aaabf0f76b1ef743b5ae00b4048916b4b4e3643f3d56ed
font_01_sfnt_off00005ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 19352 bytes
SHA-256: 9f3b0849c5c5b12a3bc40f4b263f1c981d0f65d7b3689ad99535940996ee3bd3

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