Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5634a7e37d9504…

MALICIOUS

PDF

36.2 KB Created: 2021-07-21 06:48:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eadf1a04f8fd4e5c33b44172fe6c32f0 SHA-1: d3ac9189afb1b7d3ab50f4fa4d77e8c8b82d4d73 SHA-256: bb5634a7e37d95042f06a5b1a4b5404cd8330ff72bf10d1627757199d974fdfd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that point to known malicious redirector infrastructure, disguised as 'free Robux' or game hacks. The document body and embedded links suggest a lure to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of multiple malicious URLs indicates a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-legit-game-hack In PDF document text
    • http://bassacctaxservices.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://bassacctaxservices.com/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://bassacctaxservices.com/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bassacctaxservices.com/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://bassacctaxservices.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000036eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36EB 23028 bytes
SHA-256: 0ebf730897fc945b7000ccf1a9a6b0f0b3233ec2a3800f2dbf1f1db14fef1df7
font_01_sfnt_off00006a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A89 18712 bytes
SHA-256: 0a3bb92d146b122749d57d36755b29a560cd1c032c54bb08c637f56f67b3a8e8