Malicious PDF — malware analysis report

Static analysis result for SHA-256 637152cd62375fa6…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 03:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7607f9845a86d65f4c4f2668c0f43fa4 SHA-1: 35b463d91d3d37a250145ef53911ff8b3fc31f8e SHA-256: 637152cd62375fa6176b62de61e58ce81bbc830cf1ff3b62e0f6bf1ba1ef5ca5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs pointing to sites offering game-related cheats and rewards, such as 'free robux' or 'game hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious download or phishing page. The document body, though partially corrupted, contains references to 'Microsoft Roblox Rewards' and a URL that likely serves as the primary download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/microsoft-roblox-rewards-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-credit-card-numbers-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/pubg-uc-lucky-draw_GM1330123889.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-with-code_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-new-cheat-engine-bypass_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/2021-robux-on-robux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/skywars-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hacks-counter-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/can-i-download-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-free-robux-without-verificaton_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/pubg-uc-midasbuy-pakistan_GM1330123889.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/win-free-robux_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_off00002d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D90 22616 bytes
SHA-256: 6d8eb27942873de24e0a2acb4f1ac5d10f91d67b80ee20e093560e8d475768f6
font_01_sfnt_off00006031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 19244 bytes
SHA-256: 15236a9164adcceeeabc7c563dc8d3c1b4330ca6f2c8a0eb4af9903fd5553319

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