Malicious PDF — malware analysis report

Static analysis result for SHA-256 4042371546dbbfcc…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 15:23:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f715619cfd10d77c762f595fbe2f712f SHA-1: 7eabeb769e23e4e0a4c7621319c6fa398eb31c4c SHA-256: 4042371546dbbfccdbdba3786f66b2cdfcf536d8d083b95b2060e45503f0ee16
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' or game hacks to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/roblox-robux-hack-2021-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

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-robux-hack-2021-game-hack In PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/beta-this-obby-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-money-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-easy-hacks-to-get-no-virouses_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-gift-cards-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-script-hack-rovive_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-service_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/e400-free-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/omg-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-hacks-for-computer_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-go-through-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-roblox-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-spins-links-app_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_off00002f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F99 22060 bytes
SHA-256: 034b305301fd3e9c2631997cefff0ff8985295f583be25634ac7fd174ae201bf
font_01_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 19012 bytes
SHA-256: b5d33cc6658001491aee341b1ec1f99181cba1f549d83c6887faeb4040e4ea6e

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