Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5133d09c6c8ee4d…

MALICIOUS

PDF

38.8 KB Created: 2021-05-23 10:22:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 23368e1aeb54f32341a4528e74a12e56 SHA-1: 874a8ddf751e49ebfb68a6b803ae0cf707ef0f44 SHA-256: f5133d09c6c8ee4d41feebcfaeb9c0e62d4cb84347635084b0894b3e80e31c48
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it's a lure for game hacks and free followers, directing users to a malicious URL. The document body and embedded artifacts confirm the presence of links and calls to action designed to trick the user into clicking. The embedded links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/835599320/free-tiktok-followers-no-survey-game-hack PDF link annotation
    • http://sv-nahetal.de/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000314c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314C 26296 bytes
SHA-256: e10f5b5bc028b69d6336897939f4252223a3662bc2bee17d39bd68827c808502
font_01_sfnt_off00006cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC3 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 18128 bytes
SHA-256: 4d5ae90dc7158db100f8a60f18795856627c30e44bb6186b706c2f28ceb56c30

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