Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ab2f5384890e20…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 23:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f2b496637b05bd22cc2a31f8abcf5989 SHA-1: 57d94c9de749d8c61f2bc22d1026d33a56af6bae SHA-256: 73ab2f5384890e20882314ee35b368ffee5d8a7a84435e31afb7d6070a6ffc33
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free Robux codes generator' lure. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely aiming to trick users into visiting malicious sites or downloading further malware. The presence of embedded URLs and the nature of the lures point towards a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-codes-generator-no-verification-game-hack In PDF document text
    • https://www.vista-design.hr/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-hack-minecraft_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_off00004a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A10 25964 bytes
SHA-256: fc1427d4dcd5c5b9f75407f41dc51c1d0bb5d0e73dd7698c8f830159ac309d46
font_01_sfnt_off00008598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 18776 bytes
SHA-256: a4a7f46a8ec4e4fe0089faa119d4be48f59112184e2c655defb35f5102acccee

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