Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d48a5f755bd66a…

MALICIOUS

PDF

41.6 KB Created: 2021-05-17 19:02:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 43dd0cf84a14aefff865ee0667505e87 SHA-1: 0b131e86e607a4b18fc3005569434a8197fab557 SHA-256: b1d48a5f755bd66a636d22097eaeb0a130315d14e2fed175471125688a90d2c6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' for Roblox, directing users to a URL associated with known malicious redirector infrastructure. This indicates a phishing or scam attempt, likely designed to lead users to a malicious site or download further malware. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/games-on-roblox-that-give-you-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000349d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349D 25936 bytes
SHA-256: fdeff99e499fb2f89fc4eafb05b029415d90e4c88df990e7ee1b966028f2291d
font_01_sfnt_off0000715b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6D 19240 bytes
SHA-256: 3009583106c638257969d16940e6b1d2d6c9c8cef99a9d3856a451b20885bf07

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