Malicious PDF — malware analysis report

Static analysis result for SHA-256 346e42fa24e0cbc3…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 05:39:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2cd852dd25ec6228cdf53975a15d7e8b SHA-1: 20423625e01de671e702f0482eaec4cb1f1a1edf SHA-256: 346e42fa24e0cbc3bbefd3141e49526b967c6239d5d50c1d9a487ef5cb21dad2
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 0.9769

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/406889139/free-coin-master-cards-link-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AA 25448 bytes
SHA-256: 3266cac6a8e2f3ec2bfea1e8e0a577b0fd9bd3071d4e6b312f12bd1a18f342db
font_01_sfnt_off00008a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8F 3188 bytes
SHA-256: 4629a395748010bb82ac66d5a167d97fc60ab0161a42f455f232e005fd654ae3
font_02_sfnt_off000095ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AE 18056 bytes
SHA-256: 9071f122c67917f0b34eb320479b1427d840cc0eff292ee930c0f68fbd18a3b2

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