Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d7d5de2cd3bc41…

MALICIOUS

PDF

38.0 KB Created: 2021-05-25 07:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f3f3483c3dcdcbef780ad6861b80f67 SHA-1: 722faefce5c7f6073203075f6abf3b948b8947d1 SHA-256: 63d7d5de2cd3bc41da55ba660108c045e779790118917804506d5a3a4e3170ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL associated with game hacks and free generators, indicating a phishing or scam attempt. The ML classifier also flagged the document as malicious. While no scripts were extracted, the presence of embedded URLs and a call-to-action button suggests the document is designed to trick the user into navigating to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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-2021-game-hack In PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://discordIn 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
stream_002_off000035aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35AA 26988 bytes
SHA-256: 4f23f42c26f15fd33667797dfceeca7d82d64e0b2186569045a91117d16dd746
font_01_sfnt_off000072c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

Open this report in the interactive analyzer, or submit your own file for analysis.