Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b6d29a859ccf61…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 11:53:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f58d3f891827a9512486a8401919c361 SHA-1: eae602c37d73c00c97d39b3750b306c6c712f1cf SHA-256: 34b6d29a859ccf613feed633fe2097640acdc5865a4d31a8ebf48e812b016f05
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for 'free Robux' and 'game hacks', directing users to a suspicious URL. It also employs an MFA harvesting pretext, suggesting an attempt to steal credentials or session tokens. The embedded URL is consistent with phishing or scamming activities, likely aiming to lead the user to a credential harvesting page or a malicious download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0297

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.tw/app/431946152/new-roblox-logo-gives-free-robux-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00003bef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BEF 26736 bytes
SHA-256: 65b39f1a038bc75c0f330dd13a51f1429b3f828809b91cb19a5892e9676b3131
font_01_sfnt_off000077f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 8440 bytes
SHA-256: 0d8b8df279c14b44ee0ddec9b90f426a4e498e29967da1cf73d59bf72486f398
font_02_sfnt_off000092f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F7 18776 bytes
SHA-256: b7a67da6608ceac8da6097350666672503ca3cdca82ff4abcb087951a9a315ad

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