Malicious PDF — malware analysis report

Static analysis result for SHA-256 373c488ff95595b0…

MALICIOUS

PDF

35.4 KB Created: 2021-06-23 09:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 70b7d943ac4131eaaeee4ec2605728b2 SHA-1: 1e588cd158724b9895fcc3ac3665a36e2231eadd SHA-256: 373c488ff95595b0cad8c979825dadbe4aff01c62e2f9e8ea05453e1bbcfded5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering free game currency (Robux) and game hacks, which is a common lure for phishing and scamming operations. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one of the embedded URLs points to known malicious redirector infrastructure. The document body and embedded URLs strongly suggest a social engineering tactic to drive users to potentially harmful sites.

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-do-you-get-free-robux-on-roblox-on-ipad-game-hack In PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-free-robux-by-robux-king_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-pin-code-hack_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/robux-codes_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-2021-without-human-verification_GM406889139.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/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-coins-on-coin-master-without-verification_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_off00002f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F35 23068 bytes
SHA-256: 3d7d3477e40e080541d5d9b991f28901aabc4993eb038ae8455592dc7dc4ecd8
font_01_sfnt_off00006313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6313 19736 bytes
SHA-256: ce5e6574854ddab9c97661873f5dd9abb27a7b25a6e02255d1fa01f1ab954ae8

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