Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1de301aaa8ebdae…

MALICIOUS

PDF

38.9 KB Created: 2021-05-24 01:19:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1edc7d93cec77ba3ce528e063f104433 SHA-1: c12d40303d21442750cb74f8d73ba5e97b674546 SHA-256: b1de301aaa8ebdae7c8378c9f0642cafa3794016f606e051739f50566dfbf972
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one prominently identified as a malicious redirector leading to a 'free Minecraft Java Edition game hack' lure. The document body reinforces this by displaying similar game-related lures and a call-to-action button. The presence of multiple redirector links and the ML classifier's high confidence score indicate a deliberate attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/free-minecraft-java-edition-game-hack In PDF document text
    • https://kinderdam.nl/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-hacks-for-coin-master_GM406889139.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_off00003496.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3496 25848 bytes
SHA-256: 08d87b8dd056296268c55762c8150dac81b3961e882c21a8c3524f3345e13487
font_01_sfnt_off00006d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000076ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 18164 bytes
SHA-256: c8dc3c0ccaec2cbfabf4f7c22776233ed86b35e7dce69fc624c99833f95d0764

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