Malicious PDF — malware analysis report

Static analysis result for SHA-256 7158787f761f8aaa…

MALICIOUS

PDF

34.6 KB Created: 2021-06-23 16:06:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a2c4fdd84ac7601429d46618fdd3bd2b SHA-1: a08074fa76efb593c0c0604c99284fa61c0e286c SHA-256: 7158787f761f8aaa57b2a4e12835f4b6c7121f5d4f85d58bfb3067d5ec743380
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free currency, directing users to malicious redirector infrastructure. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-hack-robux-hack-2021-game-hack, which is associated with known malicious redirector activity. The document's content and embedded links strongly suggest an attempt to trick users into visiting potentially harmful websites, likely 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.co/app/431946152/roblox-hack-robux-hack-2021-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacking-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-someones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-custom-script-runner-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-roblox-wallhack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robloxians-robux-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-made-50-days-old_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/generator-free-account-old-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacked-roblox-accountsd_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-app-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-fun-com-free-robux_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_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 22404 bytes
SHA-256: 28540fbe89da4c15424bb09a59c1ebac145c686162d59ae3c3bc1d03a6627a24
font_01_sfnt_off0000615d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615D 19232 bytes
SHA-256: 810ef7d155ab145b735fb9080f1d41c914e6e93152b5b601ced0fcfc303cca5c

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