Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d50711e9c8bb39c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 12:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 814e0f8db0f19301df7034bd36705af9 SHA-1: b24e4d34cf0214d5609c8f247409e04652b31cd2 SHA-256: 4d50711e9c8bb39c89ec0ebda58a13c86db0f59503a40afaa9792c01045a4957
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 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-for-free-game-hack PDF link annotation
    • https://hotelartskathmandu.com/userfiles/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-lost-cheats_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-free-ios-2021_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F20 22276 bytes
SHA-256: 9c591fa2b733324f1e395f2ac5038f0a1fd1032ff20e7c0f6395320c16f7dd81
font_01_sfnt_off00006058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6058 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

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