Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc985d270c258864…

MALICIOUS

PDF

39.9 KB Created: 2021-06-07 07:16:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2fbfacd570dc4cc87b458159bed7a9e0 SHA-1: 938c3ea4e89e7fd6299e7faebbda8a11db9e55b1 SHA-256: fc985d270c258864fbd3e99b390c57984c1819de98f024247965f41815e7040c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, disguised as a 'game hack' or 'generator'. The document body explicitly mentions 'How To Hack Jailbreak Roblox 2021' and includes a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', strongly suggesting a phishing or scam attempt. No scripts were extracted, but the primary threat is the malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0331

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.tw/app/431946152/how-to-hack-jailbreak-roblox-2021-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
font_00_sfnt_off00003bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE 26728 bytes
SHA-256: 3684ef2034108f0b5838fade88256f32047fa7048faaf589ea8a476c9226a845
font_01_sfnt_off0000781d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 19036 bytes
SHA-256: 13e5108de165c379491d688d5a0a3a1323dfa1f9ad5f4b5140f036bda08f11d2

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