Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfe800775c6087d…

MALICIOUS

PDF

36.9 KB Created: 2021-05-16 14:31:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e1d205932fcbaf4dca18f0e5fb53e08a SHA-1: 0423f6b8fc6767cec54b4ca8f6ef28cdc94c8310 SHA-256: 8dfe800775c6087d0a6dfdeae93a0a05b69a2c34bbca647d7d2c7ed7ef1742f0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to 'Free Robux Hacks No Verification' and contains multiple links to a known malicious redirector infrastructure. The document body, though partially obfuscated, reinforces this theme and includes a call-to-action phrase. The embedded links likely lead to a second-stage payload or phishing page designed to exploit the user's interest in obtaining free in-game currency.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-hacks-no-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E2 25488 bytes
SHA-256: bb1265d0d8ea33e389900580904248780776474585acdd942ce9c6a07414e945
font_01_sfnt_off00006d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5E 18772 bytes
SHA-256: addbd32849de550f6a3cbf56c70cbffa7cf804e2f09d57d2f784457513eafccd

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