Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf825f9fbdd755a4…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 03:59:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f83fe96f4b35bc3d73430b46e11d539d SHA-1: 23c83dfe5a963294ca6b117891e1bef538ff761e SHA-256: bf825f9fbdd755a48b946f57757d22031e6fbc1748a82409fc22614bd28ea5c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, disguised as a 'free generator / game hack'. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats for games like Roblox and Coin Master. The presence of embedded URLs and the nature of the lures strongly indicate a phishing or scam attempt, likely leading to further malicious content or credential harvesting.

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-bc-for-free-roblox-2021-game-hack In PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-hack-roblox-on-ipad-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/google-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-do-you-get-free-robux-on-roblox-on-android_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/robux-hack-tool-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.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_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 22172 bytes
SHA-256: e4f1c786e075147189196aaf2bfe5c41d0794a91acf5acea90e238e7f4fb1b99
font_01_sfnt_off0000600f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 19320 bytes
SHA-256: 1849e70b3d7c8ef353eb1577050441af4e826e27e10d54f17a68cc162215cd7c

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