Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c41dd7b757094a4…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 20:15:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a488a2d17b41e1fd6d66f1be3f47d4e1 SHA-1: a3493eddf9c1d9e0c62e1c6530d6d17e4d82d240 SHA-256: 5c41dd7b757094a40f78aac5b20408360010089d96709496b08b62eb27e25bfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacking to trick users into clicking a link. The link redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

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-prison-life-hacking-why-is-this-even-a-thing-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-chromebook-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-arsenal-hack-script-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fidget-knot-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/anyway-to-get-robux-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-free-lumber-tycoon-2-roblox-injectors_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacking-roblox-stat-games_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-code-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3139 22972 bytes
SHA-256: 05801517bd80919ab8e3e23c410ae3fe6cb20a3268d5858c93125e958e15944b
font_01_sfnt_off000064ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 19400 bytes
SHA-256: 6b8276563fef33b14cd7497b6ea1a9a88fe82a133e13ab89a612535f29aeb3ff

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