Malicious PDF — malware analysis report

Static analysis result for SHA-256 c068ec0eda2d0114…

MALICIOUS

PDF

38.2 KB Created: 2021-05-10 12:33:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dedb2c8988f2b217d2f514e281178f4c SHA-1: 4188914a6d1e193ea4a242148b86b5e225b318ef SHA-256: c068ec0eda2d01143496acef6e3008538edc270d47fd012ff68c5a2fa577c545
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector disguised as a 'free Robux' generator or 'game hack'. The document body and embedded heuristics indicate a lure to trick users into clicking these links, likely to download a second-stage payload. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or social engineering attack.

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-no-human-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
stream_003_off00003317.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3317 26744 bytes
SHA-256: 43ee211a088765ce02773594507a6b0a25d68161b86cfc00afab7eefc081a08a
font_01_sfnt_off0000727a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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