Malicious PDF — malware analysis report

Static analysis result for SHA-256 b261c0d7d14e47b5…

MALICIOUS

PDF

49.9 KB Created: 2021-05-16 00:09:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ce54671418c446037444fcffaaa5ddac SHA-1: 2b23c6236827616589dbfd9c7f1dc811d038e1ba SHA-256: b261c0d7d14e47b50c3e7408731aa20424643c201f27d3b072591af0403a589b
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 0.9349

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-hack-people-on-roblox-game-hack PDF link annotation
    • https://koeltotaal.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/roblox-girl_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49ED 33660 bytes
SHA-256: 29c822a3f1f87f0b233b1e4b193859c3f15499ff76cc28d890fb1a8c4207db51
font_01_sfnt_off0000940c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940C 3444 bytes
SHA-256: f9b55286e100072b4fbb0521476d054be3f39f99bae30dbeb65b2f069bb6bb60
font_02_sfnt_off00009f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7C 18676 bytes
SHA-256: 9439cdf519c477105af26a237b903c28353edd649090bb99f856962d56c9ecd1

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