Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff3161cf7dcde27…

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 09:48:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc34fa1dbf5d3b56c5008e7a300eac7a SHA-1: 70f64ff48c66d1c0bd3eeaaf9112ef922922d7ed SHA-256: 0ff3161cf7dcde27443185f9ab414e141f02e1adea54debda6baf55e97fa757d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' and 'generators'. The document body explicitly mentions 'Roblox Hack' and 'Robux Generator', and includes a call-to-action to access a generator. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/mobihack-net-roblox-hack-game-hack In PDF document text
    • http://ambingenieria.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/robux-hack-2021_GM431946152.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_off00002c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C35 21644 bytes
SHA-256: 2ffd21653fa55c11db6cf3f3b5ad8826531acf26c4509c4e21b028a1c36223aa
font_01_sfnt_off00005b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B98 18952 bytes
SHA-256: eaa376580ef2471b72a923b4e976f2aeead2b1a901135636722948f13097cdd4

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