Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e10af10637dadc…

MALICIOUS

PDF

41.1 KB Created: 2021-05-11 17:45:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 80960c2ba1c30c08da30ca69ec9d36eb SHA-1: 00b4cfc8ec8f5fd4190d4d8b617b273669b355a3 SHA-256: b5e10af10637dadc4abc8a3c6b683088f65a8d8d341a2fe8d9aa60d2c5d2bfc7
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/406889139/coin-master-on-facebook-game-hack PDF link annotation
    • https://kalendarite.eu/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/freerubux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-websites-2021_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_off0000473a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473A 24576 bytes
SHA-256: 13ecfbdc7a5969d3203db6fd17e56913308708c4c9ee624f5bf0cc1dba27f505
font_01_sfnt_off00007ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE6 18040 bytes
SHA-256: 05dbdd16effe8c1ee272b572c92cf938ac8812b7bce12264ce344bdfed4f92f7

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