Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ec7840b2261169…

MALICIOUS

PDF

41.6 KB Created: 2021-05-13 02:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3f9e0ea944dbbbbc165c4fb05ac82808 SHA-1: c6723a0022f398312cbb70488333cff9469a519d SHA-256: 91ec7840b226116991a6411e9b4e6c29e5964b82a7f0c8980ef90c2f8ef9524b
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-fan-club-game-hack PDF link annotation
    • http://reisebild.eu/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-robux-without-survey_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004809.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4809 24744 bytes
SHA-256: a2c7f0ce39cd05a239fed4c44f58447dc02e1fddfb7692537e952f321c0e8da6
font_01_sfnt_off000080c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 18080 bytes
SHA-256: 1b58ad6ca3986db2e615a45b5b3b997af56259df789f1331e37082b56e43c60a

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