Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6402e5c6d92f6f7…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 08:53:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae965bfb360d7f25e5f609e8202d85dd SHA-1: 4ea857acb8a91e7b57e77c7af12bdbc8712e7ad9 SHA-256: a6402e5c6d92f6f751e92bd756dc82bdabc33804b2e9cc49921711c4a299d0de
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/835599320/how-to-see-chegg-answers-free-tiktok-game-hack PDF link annotation
    • http://librarysenior.com/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-jackpot-hack_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_off00004fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC1 26356 bytes
SHA-256: 6ccbe94cce0bd0f0bcfad4a3cafffbc81ad11c3a187d5ecc9827bf968d2ddb59
font_01_sfnt_off00008ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA1 18076 bytes
SHA-256: 95a27df9b75d87296fa7a596b94b76f19500ef81bda6dcef954db17c5bbc63f3

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