Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d226098edf2473…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 10:10:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8a66f83d5376ef3382d11f64ff41ac6c SHA-1: a20e6805e0741a6a3ff16fd29d9d535fe8c37e8c SHA-256: 19d226098edf2473badb0da72eaee2e0e454b95863cabd6ae295c4dcd167d511
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a URL associated with a 'Roblox Free Robux Game Hack' lure, indicating a phishing or scam attempt. The heuristic firings confirm the presence of malicious redirector links and a lure designed to trick users into clicking. No scripts were extracted, but the document body contains text and links that support the phishing pretext.

Machine Learning

  • Nyx PDF Classifier clean score 0.0739

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/roblox-free-robux-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_002_off00002afa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AFA 29504 bytes
SHA-256: be60f2940cc4726d51ef11e1f329ce394760fb9ae6947d898321f777e39d022b
font_01_sfnt_off00006f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 18088 bytes
SHA-256: 03c92d59c548fbfdae08874221752d30f8caaed88781636bf7d18542e7c5fe52

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