Malicious PDF — malware analysis report

Static analysis result for SHA-256 e523a27291eaa928…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 22:59:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ec8b79b8da9338733c488a653b54bb1d SHA-1: aab9c1ae51921afdcde0761f469c28b6f731c8f2 SHA-256: e523a27291eaa92809a0981108f31afb09688c224edddead15e7ab43f8441dc2
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/406889139/coin-master-ios-hack-download-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/heists-free-roblox-demo_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/city-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-unlimited-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-robux-on-roblox-hack-no-offer_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/counter-blox-roblox-hax-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/got-hacked-on-roblox_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_002_off0000303e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303E 22616 bytes
SHA-256: 20b611860e214e7ec9eb21f2fe471f54bf42945a5b2a2819e21cce6c61fac5f9
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 18584 bytes
SHA-256: 7e822913b4fea7d257ec89e4fb3612a1a593f954b08fa181a320ff163ba54c10

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