Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b8f21048b22f5b…

MALICIOUS

PDF

36.4 KB Created: 2021-05-25 08:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afaa87da78acd47f6b45923ce89bdb42 SHA-1: aa7094c142cd874c124490cc7c9a78e74981bd33 SHA-256: a6b8f21048b22f5b11a22f7647b450eed9826d5f5e11a911da1df2937e84fb54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically advertising "free generator / game hack" lures. The ML classifier also flagged the document as malicious. While no scripts were extracted, the embedded links and heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/minecraft-free-ios-game-hack In PDF document text
    • https://www.tsdb.com.au/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://www.tsdb.com.au/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.tsdb.com.au/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://www.tsdb.com.au/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://www.tsdb.com.au/images/coin-free-spin_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_off0000327c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327C 26892 bytes
SHA-256: 1e4e1b95548e06064e3a90364ab7c3e020ce8363fefa952b293e77366c9597fa
font_01_sfnt_off00006ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 17712 bytes
SHA-256: 54d91aee1a0896e30cfb652b9b9fc91e7951cfaa65da7a48657c461bc2dd637d

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