Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8846f13b5f31984…

MALICIOUS

PDF

49.0 KB Created: 2021-06-04 04:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b70feb6e24df3060c0a5e1d8be91d1f1 SHA-1: 4bb4906b9844002a638ff54139475433658fd75a SHA-256: f8846f13b5f3198441d77866d17419f4d46d027de8aa278d151ef7f4840f7758
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 0.9871

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/431946152/robux-for-surveys-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/free-tiktok-followers-zonder-verification_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-2021-iphone_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_004_off00005444.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5444 32572 bytes
SHA-256: e7496af6a769166aba91582daa714af9ceaab08bf4c208c45202248d42dc17e0
font_01_sfnt_off00009d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D31 18308 bytes
SHA-256: 7f774dfd0b19443a0143427e3febf5e3e78e6b4c2c23fb5340d2060c1fb2add6

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