Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b63829ae11762b…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 22:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 599022dbff48e484bc9daa8c7c827e9f SHA-1: dcb42df4ca8eeca14dfe10c8ad8d9b57b1fdb940 SHA-256: d0b63829ae11762bbd863e04391049d94f5b625fe81ce807f87d30663f02effc
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/how-to-get-free-robux-on-roblox-game-hack PDF link annotation
    • http://yochin.org.tw/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://yochin.org.tw/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://yochin.org.tw/images/how-to-hack-minecraft-pe_GM479516143.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_off00004813.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4813 26120 bytes
SHA-256: f27cdf0248437dadcc3cc84518b518c691eaa544a394c30a47bd6b0abb1ceb2b
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 18356 bytes
SHA-256: 07f7f5fe088ebb6a81b9aca0d3b7acb37488304f642f9e675d153fcc87cea6c5

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