Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aae3d7b52fc88da…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 10:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6e758a0ec5c3fe5ba4803bd53613b2a SHA-1: 9ac9967e77e487e567ce6250c2d43ef146142cf5 SHA-256: 8aae3d7b52fc88dac6d6e359dafaebb1ce9529d71cf30090646d005388eaaf06
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 0.9432

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/free-robux-2021-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-claim-free-spins_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_003_off000049e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E8 24980 bytes
SHA-256: f4f81e7e06054e19c2ba81bb3dd43bbb185beafecc1b9619571c44b29181be7d
font_01_sfnt_off000082e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF4 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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