Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb50726d153d7d6d…

MALICIOUS

PDF

40.0 KB Created: 2021-06-03 04:08:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a585d1f47452243e4a6b67bf79138887 SHA-1: fab17d572b17dcb44084cd22e9343aeb4054f67b SHA-256: eb50726d153d7d6de43c29003ebb93b479d2da462b5609cb10a4cb6e8ff70d2f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to a website promising game hacks, identified by the PDF_GAME_HACK_REDIRECT_LURE heuristic. This strongly suggests a social engineering attack aimed at enticing users to visit a malicious site. The presence of embedded URLs and the nature of the lure indicate a phishing or scam attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0353

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.online/app/431946152/robux-premium-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_004_off0000399b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x399B 28592 bytes
SHA-256: 4f3fcc8dbc3a5252ac010524fb548305250100940ba6fc2b72f64e959fcdf67b
font_01_sfnt_off00007a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A90 18384 bytes
SHA-256: 177267aa0ce1c90065d8421ade4190e52cdc6c4cb76b2453afd409bcd911e8d4

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