Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1d67c017eeccef…

MALICIOUS

PDF

41.8 KB Created: 2021-05-15 13:41:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b84d378d731f3438d0eba5527758335a SHA-1: 49cdd1722d23b7ce671fbebe8d980e2111367e0d SHA-256: 4d1d67c017eeccef5800b3f2fe9f5a0cd5b41e690ba6fba487e79ebb97555d8c
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 0.9971

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.xyz/app/431946152/roblox-hacks-for-mac-game-hack PDF link annotation
    • http://drentklubben.se/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/wurst_GM479516143.pdfIn PDF document text
    • http://drentklubben.se/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://drentklubben.se/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://drentklubben.se/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://drentklubben.se/images/free-robux-wheel_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
stream_003_off0000483d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483D 24524 bytes
SHA-256: 8fff4857f1754e19e781f98f0ad3586ffc64258a5801ac6101de82eb4a49d280
font_01_sfnt_off00008031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8031 18544 bytes
SHA-256: b54d427420c2b6acb67d73efd488d39bfb4939947f3518d8bf7854551a24b695

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