Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82ebd3f422b09e8…

MALICIOUS

PDF

35.2 KB Created: 2021-05-21 08:22:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7e306ce0b90b4837fbf9a1223293e83e SHA-1: 302a3506d1bb8420235a8fe172d3acdc37a26ddb SHA-256: a82ebd3f422b09e8e24690e9dbe4cc741d5f21562b6edb2f9fd09baaf0b771fc
82 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to 'minecraft-free-online-games-game-hack', which is flagged as a game hack redirector lure. The document body also contains a call to action to access a Minecraft generator. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-online-games-game-hack PDF link annotation
    • http://bgnails.nl/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-games-that-give-you-free-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_off00003178.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3178 24588 bytes
SHA-256: 1c83b95313aa7c3e22b553563431f8087987d48a5e8e42e4e313bb12886d3012
font_01_sfnt_off000069aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AA 17900 bytes
SHA-256: 4b77619cba729584a62e96e7fd69b59749ae88ba583596c01091ec51b146d7ca

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