Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f6248165bac5b1…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 13:58:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b085de261818374ee54e66382ca21449 SHA-1: 0db7d2c72c7e42bb15954c5419c0f075a2b5f8f8 SHA-256: 77f6248165bac5b1d89685b6e8ec154c058e7e384874a54ea751434c34f2b3da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that promise free game currency or hacks. The document body and embedded URLs suggest a lure for popular games like Coin Master and Roblox. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/pasos-para-hackear-coins-master-game-hack In PDF document text
    • http://greasley.website/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/play-roblox-for-free-on-google_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_off00004828.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4828 25320 bytes
SHA-256: 327c07eb7e635a60d800a2a7ad6ba1967b2c5bcf5c5fdb6c673ba3c3f0a4b367
font_01_sfnt_off0000825a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 17868 bytes
SHA-256: 59162798968571b58eab4ea002b9aaa75bdfc5001cc9a37297d5f6ee37b3b3bc

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