Malicious PDF — malware analysis report

Static analysis result for SHA-256 753fcb7f1762f9c9…

MALICIOUS

PDF

36.4 KB Created: 2021-05-10 10:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d95e73ffa1d887d876742142cafc67ba SHA-1: 23df99b37a1f206432a66d16e8c4d2f1ac775df9 SHA-256: 753fcb7f1762f9c90e0ebea6ffb1ac10068bfa0eea3e1b763f680d06d47f00ba
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to a website promising game hacks, a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a lure for a "game hack". While no scripts were extracted, the document body and heuristics strongly suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-hack-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
stream_003_off00003383.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3383 24268 bytes
SHA-256: c3dff1b1c0fed4ed15e747532cb97b68f0382aa9a884588f885260387aa19d10
font_01_sfnt_off00006b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 18772 bytes
SHA-256: 87cd01898e0c435f6b8e3fdf3db31fb3453f40f32176463e71dafc861d9bd3f7

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