Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2794b21490c92a9…

MALICIOUS

PDF

39.6 KB Created: 2021-05-21 02:40:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c61e73156c5921052dbc11111006e206 SHA-1: 55be6020f0f7d7d5599701da8bbf489d91f0b3e8 SHA-256: e2794b21490c92a99645e8b5e5d87278699958dc1eaec95be538540cd02b9e80
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and 'game hacks' to trick users into clicking a malicious link. The link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document's metadata suggests it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier clean score 0.0134

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/how-to-get-free-robux-without-downloading-anything-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002b3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B3D 26848 bytes
SHA-256: 968471d4967f1881e1e052a43738559b29d1c136a4d07601299f21ec9f09ce96
font_01_sfnt_off0000679c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 19880 bytes
SHA-256: b3cc443709e3d0792834aff36fc45ebf0729ec5a88bbf4f00dbe60b4c0075203

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