Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5064d62c10d63c…

MALICIOUS

PDF

37.0 KB Created: 2021-05-20 18:19:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 65e18abacf92f14831c49364c594f4a3 SHA-1: ff52c952834b59bd1b5ea9bc2c76b96eb155da72 SHA-256: 3f5064d62c10d63ce903cc38b0f18a24e4824efa91574a4240304c3836738dbe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/roblox-hack-ga-game-hack PDF link annotation
    • https://www.elternrat-bolligen.ch/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.elternrat-bolligen.ch/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elternrat-bolligen.ch/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elternrat-bolligen.ch/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://www.elternrat-bolligen.ch/images/is-minecraft-java-edition-free_GM479516143.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_off0000318b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318B 27552 bytes
SHA-256: c7e6fd501a247d9f68c2e51ea9c5917bb9c9aac9a44cb374fdd1f453200af033
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 18184 bytes
SHA-256: 3275d650180bfb45a9fb7d5756aac43dcbbafe87c7818dab7a1b2e1f44194404

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