Malicious PDF — malware analysis report

Static analysis result for SHA-256 da22a8a9fddab135…

MALICIOUS

PDF

31.5 KB Created: 2021-07-21 17:20:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 58ee4f23335c98b9ebdf29d1646f86da SHA-1: c9cc39c1f62de66840f4221d4982622038052453 SHA-256: da22a8a9fddab13568fe16cbafbfd4d5dee0d4ef718b1fe7a2dd0ba634e6b1a1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link disguised as a 'free generator / game hack' which redirects to malicious infrastructure. This lure is designed to entice users to click through to a potentially harmful site. The document body and embedded artifacts suggest a social engineering tactic to drive traffic to the identified malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0580

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 http://netcdn.tw/app/406889139/free-spins-coin-master-unlimited-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_off000022c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22C8 24032 bytes
SHA-256: 63d6f948c44d535d4e49348a49fa3dfd2a2d2879c978dafa497f55bc7498414a
font_01_sfnt_off00005917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5917 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

Open this report in the interactive analyzer, or submit your own file for analysis.