Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fad30a2c5b179b…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 15:59:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d08bfb472038e0cfe4b054385a0967d SHA-1: 740f9231d96654118458ed38dee934c3630d39d9 SHA-256: b8fad30a2c5b179beeabebc03218b5c74bc26f0ff741f8fabf542705b7d4a6a3
160 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators. The ML classifier and heuristic firings strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the embedded URLs and heuristic firings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/roblox-hack-com-game-hack In PDF document text
    • https://kldcardio.ru/images/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-unlimited-coins-hack-apk-download_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_off000033e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E5 26084 bytes
SHA-256: ae6989e5c20b9594f6750e5e2e5d298f6152186e45e337687408e20b92491de2
font_01_sfnt_off00006f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2D 18440 bytes
SHA-256: 92e56247950081f5f8ea935637ec6d93dafa31aa334148af106ab9a8365bd2e0

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