Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd15dd619ece320d…

MALICIOUS

PDF

49.7 KB Created: 2021-05-22 02:42:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: df4b2286615cb9453a465d1b29e5aaa0 SHA-1: 52a81822d9c51534a2be22255c9a2a93038000ef SHA-256: fd15dd619ece320deecfa9dde7accb512e0b858172ef882d769b00c5020be31c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Offers' and a link to a known malicious redirector. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-offers-game-hack, is associated with malicious redirector infrastructure. The document body and heuristics indicate a scam or phishing attempt designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0163

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-offers-game-hack In 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_off00002f2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F2B 39052 bytes
SHA-256: 2d614aa8462af23209b80e5c1a25d04c97e89f179ddaa37b9e852aeb26d273ef
font_01_sfnt_off000085f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 8804 bytes
SHA-256: 7e69baea3d60a83dacefcbe93494c2e5adb6c909e0fb6c7c933c94edf6263c39
font_02_sfnt_off0000a2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 18012 bytes
SHA-256: 2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6

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