Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c56df63f11cac8d…

MALICIOUS

PDF

38.8 KB Created: 2021-05-10 16:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a383d23d849d4d2d9e74031ca8afda28 SHA-1: 0c94bad097b0e155b6315bd4161354cd06cc1a57 SHA-256: 5c56df63f11cac8d06126ba5c2f3866746acabcaa470100fcf10c6f59e892cfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that are associated with malicious activity, specifically luring users with "game hack" content. The ML classifier strongly flagged this PDF as malicious. The embedded links likely serve to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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-game-hacking-game-hack In PDF document text
    • http://artcustomdrums.com/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artcustomdrums.com/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://artcustomdrums.com/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://artcustomdrums.com/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://artcustomdrums.com/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://artcustomdrums.com/images/100-robux_GM431946152.pdfIn PDF document text
    • http://artcustomdrums.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://artcustomdrums.com/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://artcustomdrums.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://artcustomdrums.com/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://artcustomdrums.com/images/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://artcustomdrums.com/images/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00003cdd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CDD 24628 bytes
SHA-256: 7acb29f9b2084f3acac4ecf7a4848eca7a574fdf595017403048e09065683dff
font_01_sfnt_off00007591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 18264 bytes
SHA-256: 62da0fdfc0c6032c2f0014be80ef488e4c1ececfe37f754bdf2231c0e671d3af

Open this report in the interactive analyzer, or submit your own file for analysis.