Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f545e5f59f940be…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 11:36:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4201561057c78ce2b1f161545844b546 SHA-1: e2c045e8c4b9026bfa8183ababddf40577563546 SHA-256: 7f545e5f59f940bec9fced4a373b0de3a4e9c14313b79deedf8c60d1ae79b114
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links and references to obtaining free Robux and game hacks, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to a second-stage download or a malicious website designed to trick users into providing personal information or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-robux-nicsterv-2021-game-hack In PDF document text
    • https://javisintlmedia.com/images/roblox-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-mgui-roblox_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-100-works-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-rich-robux_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/roblox-cheats-money-free_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/dungeon-quest-roblox-exp-hack_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/beyond-roblox-trigon-hack_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://javisintlmedia.com/images/hacks-for-roblox-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/cheating-hacks-for-coin-master_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
font_00_sfnt_off00002deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEB 22316 bytes
SHA-256: fa9d7b959636bf9149260274decc21e467900f7a952ee1e28bfcfd9f2e7e68ef
font_01_sfnt_off00005fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 19620 bytes
SHA-256: 753b8a8b6c13a1e6e9993e24821d49960e035ae1c9168536cd25fff59b754bfa

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