Malicious PDF — malware analysis report

Static analysis result for SHA-256 02df3f438addd983…

MALICIOUS

PDF

38.6 KB Created: 2021-05-14 11:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66e1a97378bef9d489225c8e00e1b0de SHA-1: 6cf229e337b31124e5bb47ca069fd00d54e8fcf7 SHA-256: 02df3f438addd983f0ddff53e4c2795a3cf0ddd2153eb2069e3413b375b81556
130 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors, specifically promoting a 'free generator / game hack'. The document body also contains text and a button lure suggesting a download, further reinforcing the phishing attempt. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/406889139/cm-spin-link-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_003_off0000331b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331B 25448 bytes
SHA-256: 68b17c6c5f2b1cd36252d042d75dda6f81a5fa30524f4f9723eba3425804e0c0
font_01_sfnt_off00006d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D74 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000775e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 17676 bytes
SHA-256: f953d4866123818d5866b37da748df1449ada45748e72b979b6621785a81e92a

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