Malicious PDF — malware analysis report

Static analysis result for SHA-256 87aa15482b2c1dcc…

MALICIOUS

PDF

38.8 KB Created: 2021-05-11 16:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 93601933e53db52b9843144a4fab848c SHA-1: bf251da6502b457d43f594c1baf874b6ab660ed9 SHA-256: 87aa15482b2c1dcc4f731fd6e05718981f231d47ec901abbce88a5d1871fefa6
130 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a "free generator / game hack" lure. The document body also contains text and links related to this lure, including a call-to-action phrase. The heuristics indicate that the PDF is designed to trick users into visiting malicious infrastructure, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/406889139/hack-spin-coin-master-2021-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_off000032f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F4 30312 bytes
SHA-256: 4ad38ac8fb6527655274b29eee1f24e15f05fd140a5f2008fca591000b030ffc
font_01_sfnt_off00007253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 19624 bytes
SHA-256: ccf7a15d944ec3451561d126e16ef7ca9d5e38899b802b644f7ca70bfe3c334c

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