Malicious PDF — malware analysis report

Static analysis result for SHA-256 544b8c06b3b59b16…

MALICIOUS

PDF

41.1 KB Created: 2021-04-26 19:36:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9b45335337469f321ace6c75487dcf0 SHA-1: 04d545f70fc4cfd02c6e8e46b345cf1df6472cd5 SHA-256: 544b8c06b3b59b164fab2cc6138bc7fbbce172c393611ea3b8876e5f0041ba98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to game hacks for Roblox, which is a common tactic for social engineering. It contains multiple links to known malicious redirectors and other PDF files hosted on suspicious domains, indicating a likely multi-stage attack designed to deliver malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://netcdn.xyz/app/431946152/hacks-para-roblox-booga-booga-2021-game-hack In PDF document text
    • https://donrazvitie.ru/images/hack-money-mad-city-roblox.pdfIn PDF document text
    • https://donrazvitie.ru/images/robux-bandit-hack.pdfIn PDF document text
    • https://donrazvitie.ru/images/games-on-roblox-to-get-free-robux.pdfIn PDF document text
    • https://donrazvitie.ru/images/roblox-be-crushed-by-a-speeding-wall-hack-script.pdfIn PDF document text
    • https://donrazvitie.ru/images/redline-hack-roblox-mega.pdfIn PDF document text
    • https://donrazvitie.ru/images/roblox-server-crash-hack.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-robux-generator-2021-no-survey.pdfIn PDF document text
    • https://donrazvitie.ru/images/how-to-get-free-robux-by-joining-groups-on-website.pdfIn PDF document text
    • https://donrazvitie.ru/images/obby-games-on-roblox-free-online.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-robux-android-no-human-verification.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
stream_003_off000040f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40F8 26000 bytes
SHA-256: 04560b37e8a3f29e5be0fcfee09d102b407843f51201bfb10a68c8d1ef9eb354
font_01_sfnt_off00007c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C66 19024 bytes
SHA-256: 9b7ba94d6c5a754b47f7c4932e85056d0cde74e87ca81ef25a079589239d8f6b

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