Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b7ebc4fe77605b…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 06:30:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 750cd1d96e7b90c0f6d6e50eeb63add2 SHA-1: 2df957685a25ba9f2d7112c71ea4638dbee4b041 SHA-256: 38b7ebc4fe77605b283668f41274be944d18774f2937605a9d50bc749ac3ad3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hack generators. The document body and heuristics indicate a lure to download or access further content from these malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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/how-to-get-a-free-minecraft-server-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003429.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3429 25068 bytes
SHA-256: a8b236ae99289c7cd9ef95a4fca0dce7fa13c45e1e699ca76f815a039b71e8a5
font_01_sfnt_off00006c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C76 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 17988 bytes
SHA-256: 888c9dccd83fb0c13f9447925305c3d56d9429efcbe621f5ab8e9b5d24de1b14

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