Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cf626eb6b3a93e…

MALICIOUS

PDF

35.8 KB Created: 2021-05-19 12:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b158ae8f652e11898fd667cf21a782d4 SHA-1: e850822eaa1c3a0897a56ad21c1273b708a9eaa9 SHA-256: 22cf626eb6b3a93eaa028e8229620d045be0bf620cbd7c19231a601d0fd6824c
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack lure, linking to a known malicious redirector. It also displays a fake CAPTCHA, intended to trick the user into interacting with the document. The embedded URL, https://netcdn.xyz/app/1330123889/pubg-uc-ykleme-hile-game-hack, is the primary indicator of compromise, likely leading to further malicious content or malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/1330123889/pubg-uc-ykleme-hile-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_off00002f22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F22 25896 bytes
SHA-256: bc947f4bc0667728fcebec7b2bb3857c3187931d7f83a68ce16bcfe5d119998e
font_01_sfnt_off00006967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 18684 bytes
SHA-256: f22f4558e9f490bc4ea48dd752dc0a28496f5bac4543bfc983095526a2b1b150