Malicious PDF — malware analysis report

Static analysis result for SHA-256 20828b41cdb8e0bd…

MALICIOUS

PDF

38.2 KB Created: 2021-05-19 08:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d79db62781fa7f9d88037dbf0aa11bd6 SHA-1: 301256ce5dfc204b223186c39562731b8d215c1d SHA-256: 20828b41cdb8e0bd104437d23c0b9a049b2dc9533a2cae5f822cdda67c5b1461
92 Risk Score

Malware Insights

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

The PDF contains a lure related to 'free Robux' and impersonates Amazon, directing users to a suspicious URL. This suggests a phishing attempt or a distribution point for malicious content. While no scripts were directly extracted, the PDF structure and embedded URI heuristics indicate an attempt to exploit user interest in game-related cheats to compromise their accounts or systems.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-games-that-actually-work-2021-game-hack.
  • 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/free-robux-games-that-actually-work-2021-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EA 25100 bytes
SHA-256: 535ca44317f0814d516ee13adf525a523e9f68ccc10de3cfe25eb62c413e751b
font_01_sfnt_off00006f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 19796 bytes
SHA-256: 825df7cf396e8d9c124972fb8483e304b72a256d7e3507e7d5ad5df48b88867f

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