Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9bb5a2497e0ccc…

MALICIOUS

PDF

37.7 KB Created: 2021-05-23 12:05:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7dee4fb1afc681c236beead55fc597a0 SHA-1: c67fb0bd9bdbf33b8b47296dc118ae858d781185 SHA-256: ac9bb5a2497e0cccbe81ead7c2f5063189a6f92aea562bd1af99170779c6ee6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites that are identified as malicious redirectors. The document body and heuristics indicate a lure for 'game hacks' and 'free spins', aiming to trick users into downloading further malicious content. The embedded links suggest an attempt to redirect users to potentially harmful sites for exploit delivery or malware downloads.

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/406889139/coin-master-daily-free-spins-link-app-game-hack In PDF document text
    • https://www.deg91.com/upload/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.deg91.com/upload/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.deg91.com/upload/files/i-robux_GM431946152.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_off00003391.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3391 26844 bytes
SHA-256: 76dd2e8ca433671d0aeb465eef70385686bd14ae7a19bf716b9be21dd38206b8
font_01_sfnt_off000071bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BB 18476 bytes
SHA-256: 8af254e049fcccc1442405a550d0e3ce0b782d3872c3c9d4c1baf9e82e1cff79

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