Malicious PDF — malware analysis report

Static analysis result for SHA-256 791ad28e2dcfa2c8…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 17:24:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 57db55cb4ab0a2e119f5936cba2afa8f SHA-1: c966d56bf305f8632cf011956fad1b398eeec127 SHA-256: 791ad28e2dcfa2c8213235cbbe1da46f8bb2a5b1370cdf81f86da1de41ac5fb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as game hacks and free generators. The primary lure URL is http://netcdn.tw/app/431946152/roblox-avatar-girl-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attack, likely intended to lead users to a malicious site for further exploitation 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.tw/app/431946152/roblox-avatar-girl-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/where-to-find-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-how-to-get-free-obc-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-free-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-use-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/jamaica-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-sword-pack-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-know-what-models-are-hacked-on-roblox-studio_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pokemon-go-free-account-username-and-password_GM1094591345.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-free-obc-accounts-2021_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_off00002d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7F 22240 bytes
SHA-256: a64819baaa34efaa26ade9fea828b7f3f7d6e85bae757663c6f558de60f63f16
font_01_sfnt_off00005eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 18824 bytes
SHA-256: f742d3aab86b275048e6daff1a328edca09eda633fd32c5e4719e48b1a5fa380

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