Malicious PDF — malware analysis report

Static analysis result for SHA-256 5171ed9d6e71010d…

MALICIOUS

PDF

41.3 KB Created: 2021-05-11 07:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa47adcb0ab7a7cb74d443dfb3328495 SHA-1: 83ad2b546ded35a5b47c2143424d9932ba7c90bd SHA-256: 5171ed9d6e71010d4cfeb173029ba515d9b1d78232474bbb62fd3ce0edcdb663
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-free-spins-cheat-game-hack PDF link annotation
    • http://global-brand.net/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/spin-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/robux-offers_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/robux-best_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-no-verification-2021-android_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_off000048ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FF 24664 bytes
SHA-256: 4067847659ac4db5f0098f798d03aeeb57ec798ce52157384a2156441d1927b3
font_01_sfnt_off00007fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD4 18052 bytes
SHA-256: 9bd717b0e04310867829ca511b483eebbd60050a5b8b31305794fbcb17f8519e

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