Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddf9d7da8ed1a75…

MALICIOUS

PDF

32.2 KB Created: 2021-06-20 06:59:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b92d8f8be8f54946f74f88da83332b51 SHA-1: 7c21080003318565e99e0e41f3ae06889978702a SHA-256: 0ddf9d7da8ed1a75c3f6f732eef15702ac402dfcb20ccf2aba7881cdb5056f31
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising 'Robux Hack' generators. The ML classifier and heuristic firings strongly indicate malicious intent, likely to trick users into downloading further malware or engaging in phishing. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hack-game-hack In PDF document text
    • http://regnataudio.com/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/how-to-noclip-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/roblox-free-download-unblocked_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://regnataudio.com/images/roblox-free-robux-by-join-groups_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/kazoks-roblox-hack_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/robux-for-free-no-robot_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://regnataudio.com/images/roblox-free-tshirt-download_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://regnataudio.com/images/hack-mod-coin-master_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_off000028ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28CA 22184 bytes
SHA-256: 6231a4db3886a17bda6a97a0db2dc273ef24c9203e43e6afdfc52fda8d2b1749
font_01_sfnt_off00005a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A05 18724 bytes
SHA-256: e8968fd2130dd0e19937d9907a0efa8c300424940f22b7ca5343d475ddd9ad09

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