Malicious PDF — malware analysis report

Static analysis result for SHA-256 81932832d30aa14c…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 17:46:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7b7ae285b7df0cc598777c8b236b3bfd SHA-1: 92b7fad82e655795351d6ae06ba7aa4079bc9c34 SHA-256: 81932832d30aa14cf564ab55d6b5dccaa7c77f16708348b4d8d08512f143a2b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking embedded links. The primary link directs to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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.tw/app/406889139/free-spin-and-daily-news-coin-master-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-game-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-how-to-get-an-invisible-head-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-me-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-sell-t-shirts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-scam-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-avoid-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-accounts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-works-in-an-hour_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-staff-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-robux-hack_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
font_00_sfnt_off00002d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D22 21492 bytes
SHA-256: b7a538dd5177e6202033040aea893eef206715d3358d3659c220d7c966360b3b
font_01_sfnt_off00005c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C11 18932 bytes
SHA-256: 36101d764955831f016478dbca268f518cf218c4ef5de7fe9a30f1aee0734da4

Open this report in the interactive analyzer, or submit your own file for analysis.