Malicious PDF — malware analysis report

Static analysis result for SHA-256 88655895159a9c81…

MALICIOUS

PDF

36.1 KB Created: 2021-05-21 22:12:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fa4ec7f93e1438553a4a1af03d6959df SHA-1: a3255db3893c56eccd14203dbf0eff36d5e98e5f SHA-256: 88655895159a9c816140bec24442eee9316bea2ffb1e8690327bc32580c26862
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free Robux' or game hacks. The document body, though partially corrupted, contains similar lures and a call to action. The primary malicious activity observed is the redirection to a potentially harmful website via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/codes-to-get-free-robux-game-hack In PDF document text
    • http://gaeconsultores.cl/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://gaeconsultores.cl/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://gaeconsultores.cl/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gaeconsultores.cl/images/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gaeconsultores.cl/images/coin-master-gift-hack_GM406889139.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E43 26968 bytes
SHA-256: 235ab68720c59a0b0350b7668b4fbe57f2866cfcb0e5e77b0c79523612a2f274
font_01_sfnt_off00006b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 18292 bytes
SHA-256: c4e16f213ba515826b0fc8bd2adb9a42249615e2a7fe5232f5ebe2d4ec6172c1

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