Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b05d82ed934f4b…

MALICIOUS

PDF

25.1 KB Created: 2021-05-19 19:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88927c8544fe7c43f07cf844cf0745ab SHA-1: d6c06b57a7bb780aba18b04778326644a8dffde6 SHA-256: 48b05d82ed934f4bce7de596d036e40da679bf3ef68a88742e2192df69867ac9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'free old Roblox accounts' and a 'game hack generator'. This is a common lure for phishing or malware distribution. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies this pattern, and the embedded URL is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0360

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-old-roblox-accounts-game-hack In 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_001_off00000fff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFFF 22124 bytes
SHA-256: 4f1414d4b44712fd1e3803858768761a88f6e31daa81da2ea9fb13c9037017a3
font_01_sfnt_off000040eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40EB 18092 bytes
SHA-256: 28275ab738aab96c4e76a81afe6e80266c9a93cb3410872403f3f88de0afcd0c

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