Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3c7c410e0d8321…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 12:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b8b73bf1d7c8ac1b608136897cff8df SHA-1: 126dd3e387539b9af8df8905dad08e4050a96973 SHA-256: ac3c7c410e0d83214c81bb1ad84e5a686e609ebd41fcd5b50946dc32f65d23f1
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.tw/app/431946152/how-to-get-free-robux-hack-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-studio-download-for-pc-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-no-download-no-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/jailbreak-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-in-ar-in-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-review_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-any-item-in-the-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/does-roblox-ip-ban-for-hacking_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/tiktok-free-view-followers-app_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/pubg-uc-ykleme_GM1330123889.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/counter-blox-roblox-offensive-skins-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-ornaments-horrific-housing-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3256 22416 bytes
SHA-256: 26e45a9b7ba3d7f6f99d653d0b913e06e5bde49368f28c47e7b90ee312e5945b
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 19152 bytes
SHA-256: a9bff55de90b7722e0be476df1c7a65da1171d9638b3b21a902752e59eae7e63

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