Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa18e33e1713bdf6…

MALICIOUS

PDF

34.4 KB Created: 2021-05-10 09:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 749ce893ce5a5e9424be9b7266d6c7bf SHA-1: 1c09d06dc8ff7d795ad440af6383d8b46eb71235 SHA-256: fa18e33e1713bdf6b17633acc6013a6c21ceafeb0f7d398a8bb5db9fa26a1ab5
170 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a website advertising a 'game hack', which is a common lure for malicious activity. The document also presents a fake CAPTCHA, further reinforcing the deceptive nature of the lure. The embedded URL is identified as a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier clean score 0.0319

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-speed-hack-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_003_off00002fe1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE1 23944 bytes
SHA-256: 8c468ac6dc24c6aa9ed50cba936d09c4e0f5469267f6336e00053d0a46f913ea
font_01_sfnt_off00006642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6642 17748 bytes
SHA-256: f707a21eaa0d8d40923885cb2c49e6cf82f884eb018672d4a149292bf9467f12

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