Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e8e19eeb81bbd5…

MALICIOUS

PDF

21.6 KB Created: 2021-05-21 06:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 169a52023446e979b317a64f9c168b4b SHA-1: 8ce34164f9d0e76faccef1f81892a12288607f4b SHA-256: 88e8e19eeb81bbd5a3062f0b1c789eae72e060124983bbd5749c9a2a4ff5a229
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hack generators. The document body and embedded links suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9226

Heuristics 3

  • 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.
  • 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/406889139/coin-master-free-spins-for-today-game-hack In PDF document text
    • http://ukrainiansofbuffalo.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://ukrainiansofbuffalo.com/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003496.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3496 12252 bytes
SHA-256: ed067df2bcf91278bb58851d6765fb4ba56ba5e8b4e697180fac785501b58963

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