Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdfde026314387c…

MALICIOUS

PDF

39.5 KB Created: 2021-05-14 18:08:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 54aea735b87c2a8018e7b955c2ce001f SHA-1: 3450ce3603350260546690c315f144fdf9a9c594 SHA-256: 6bdfde026314387cdd23a4124bfe5eaaeb52045ce060c5730af3eebd9ae0163e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a 'free generator / game hack' redirector, specifically linking to 'https://netcdn.xyz/app/431946152/free-robux-on-ipad-game-hack'. This, combined with the document body mentioning 'Free Robux On Ipad', strongly suggests a lure for a scam or malware. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the presence of external links indicates an attempt to redirect the user to a malicious site.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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-on-ipad-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_off0000316c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316C 33320 bytes
SHA-256: bd4d3478081c5a5652ec14c59a4cdb485f2c2b3aa2cbf61fed0da2b390951c20
font_01_sfnt_off00007870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 18592 bytes
SHA-256: 4ae05b13a8d3623fc8be9d582b03374b6da1b7c2137e59ff761560f156580baa

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