Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55c632be865cc00…

MALICIOUS

PDF

39.0 KB Created: 2021-05-21 01:15:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 98029de20936cdc2173e1d973457e4d0 SHA-1: 598eedc242ad0c1d202ca5a4b1743bba83dc08ce SHA-256: b55c632be865cc00fd23aa7075addc1afeeedb3d3b970f26b6c2c7b9dc359e5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically disguised as 'free generators' for games like Roblox. The ML classifier also flagged this PDF as malicious. The document body and embedded links suggest a social engineering lure to trick users into visiting malicious sites, likely to download further malware or engage in other malicious activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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-avatar-roblox-game-hack In PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-iphone_GM406889139.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
stream_002_off00002ebb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EBB 31704 bytes
SHA-256: 27dcf3f4c97902c44afe4c4e55825f5445cf1c9c343f031d88d7678624692b88
font_01_sfnt_off000076c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 18396 bytes
SHA-256: b4dd3c4f3ffdeae702bf7cab5d0e67b2e51f16692fa370b224309c32516adec8

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