Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8627f067bb1a67…

MALICIOUS

PDF

39.7 KB Created: 2021-05-10 17:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 61d0e0dffb14d677dca5d1a345d748e8 SHA-1: d7b88ab0019b6451bcc9331117386a1680f16e92 SHA-256: 4a8627f067bb1a67a2c9ce1242acd6a722f18df4946b9ea71089db85e7dc322f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a social engineering attempt to trick users into visiting potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are part of the malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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/coin-master-gold-cards-free-game-hack In PDF document text
    • http://www.kalaaliaraq.dk/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.kalaaliaraq.dk/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004246.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4246 24468 bytes
SHA-256: 004a81d43c8fc16dbc35aeb14d7b0dfedd374579e985b4f206275516d8d8d640
font_01_sfnt_off00007a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 17960 bytes
SHA-256: 5f0d383e38c54a4b706fba9e56337a6488be6196f7a5d6bfa1241f48271576e4

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