Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3829c4699f6b31…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 19:12:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: acbb0078e00813869ee68fdaa35041da SHA-1: c3c69b146f3054f6e2faed44e676eb9359ac409c SHA-256: 9b3829c4699f6b31ca8441cd4c4d45c0d2305d7bc5b1f9b50f4de43f91df924b
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/how-to-get-free-spins-on-coin-master-blogspot-game-hack PDF link annotation
    • http://1a-vermietung.com/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-hacks-2021_GM406889139.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_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 24676 bytes
SHA-256: 5b55b02549f6d495a84a29b7d13a55b4c841eb80879bc32a578222246f3869b6
font_01_sfnt_off000082e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 18628 bytes
SHA-256: dffdff87eeabeaf08b6b0d7b886c4f721907d6ee2cd896e9e47cad489ce70e41

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