Malicious PDF — malware analysis report

Static analysis result for SHA-256 029e5dfdbbababc7…

MALICIOUS

PDF

35.1 KB Created: 2021-05-10 12:04:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c450aa22ce8a39f5a2bd74f98d47a6aa SHA-1: e2b085618d024b5995909e4df4a0c4b9de4f35b3 SHA-256: 029e5dfdbbababc78dfe5ffe72cdfe4b4c6a466c0ebbbadd7fa2f64e6a5aeed6
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and a visible 'download' button, directing users to a known malicious redirector. This indicates an attempt to trick users into visiting malicious infrastructure, likely to deliver a secondary payload or phish for credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0326

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/www-rubux-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_003_off000030c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C0 24240 bytes
SHA-256: 3ad0959f942eadddaa3bfeadb8cfa28dc9bd30bac6310b09f53d5ca71058251c
font_01_sfnt_off00006826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6826 18068 bytes
SHA-256: fc38c016acc36c76b7a0729eb2c8d98b0fd59e97c8a3cfb4a698daadf76a8d1e

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