Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e40f4bd6a80d1ab…

MALICIOUS

PDF

40.8 KB Created: 2021-05-21 01:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 33b8385bf7c4c25a2303ae92572ccacb SHA-1: 54d03a7c4cd46a1ce465f93680905e9b5835ed15 SHA-256: 3e40f4bd6a80d1ab9dd2d6c927a6bfc94c774cff0c0f2756370f1cef795589a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors disguised as game hacks or generators, specifically targeting 'Roblox' and 'Coin Master' themes. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-com-roblox-game-hack, which is part of a chain of redirects. The document body and heuristics confirm the intent to drive users to these malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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-com-roblox-game-hack In PDF document text
    • http://berntfoto.dk/images/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33EF 25132 bytes
SHA-256: 307273120cec6bd87a749dbdad153174967230e03a2881c681c22f29fef31c25
font_01_sfnt_off00006df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off00007e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E01 18348 bytes
SHA-256: 0a91f6cfdfc59c313b80ddaaf1db47d93b267e297f9a4be9f2abca10b90eba79

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