Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1f7b3860f8ca4f…

MALICIOUS

PDF

33.7 KB Created: 2021-07-20 21:36:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb85f0fd8772f386638603f8d14775e2 SHA-1: b35cac15647c9151a46af9f7c373ceb5e3747c05 SHA-256: bd1f7b3860f8ca4fcb59db99b520650e0dadb07c8987ece0deaec1b86fca040f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux codes' and 'game hacks'. The document body explicitly contains a call-to-action phrase 'CLICK HERE TO ACCESS ROBUX GENERATOR' and directs users to a suspicious URL. This indicates a phishing or scam attempt, likely to lead users to a malicious website or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/how-to-get-free-robux-codes-game-hack In PDF document text
    • http://museumkk.ru/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/minecraft-story-mode-free_GM479516143.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_off00002deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEB 22628 bytes
SHA-256: 9f728d1467fec53f5c225ed2aed9c5832b70ddf20b9ed62c8a4b47065d9f59e1
font_01_sfnt_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 18640 bytes
SHA-256: 717d8f6a8bc593f0af8780c548dc1efbcecb7787422593aa31f0cce5729e7174

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