Malicious PDF — malware analysis report

Static analysis result for SHA-256 910b94af685a8fd9…

MALICIOUS

PDF

35.3 KB Created: 2021-05-23 23:15:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 69ffaf135728a09ba4c1b0036240a88f SHA-1: 0da0a772205e470bcfbed20884c585a1c88907a5 SHA-256: 910b94af685a8fd97ec3b2d72c2877fc945809ea3f3b8893e15775fa6b93bec2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and text explicitly mentioning 'Free Robux Hack 2021' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', directing users to a malicious URL. This indicates a social engineering lure to trick users into downloading potentially malicious content. The PDF structure and embedded links suggest an attempt to exploit user interest in game-related cheats to deliver a payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-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
stream_002_off00002d21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D21 26204 bytes
SHA-256: 15e3c5dabaaff27d3e547f28cac919b2142b21aa9b81c29c184a5e3b03ac4192
font_01_sfnt_off0000675e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 18816 bytes
SHA-256: b2e74e066e927f416452387fe7118a02e4882588ce64a473b0bf6318b488dee0

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