Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca79ecf9595da7e2…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 01:15:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: facb5007814d78520d66032c0fae7595 SHA-1: 5918330a8e7eaa704c0aea1aa8788c32e47ce54a SHA-256: ca79ecf9595da7e2da6146bc1bc6c11ff012b4b1b6b6f70ada1ddfd85459e1c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-game-hack, which is associated with a 'free generator / game hack' theme. The document body also contains numerous links to other PDF files hosted on thamelinn.com, likely serving similar lures or hosting further malicious content. No scripts were extracted, but the embedded URLs and redirector findings strongly indicate a phishing or malware distribution attempt.

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/how-to-get-free-robux-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/roblox-project-lazarus-zombies-hack-script_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-someones-account-on-roblox-2021-february_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-roblox-hats-3_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-coin-master-apkmody_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_off00002d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6A 22444 bytes
SHA-256: 1c2d0ba1a95ad7b254b0da2dd6123851301e5fdf87259f3e0ecbf9ae7c111759
font_01_sfnt_off00005f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F95 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

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