Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa17ff8660ca507…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 19:05:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf8e39308d422127682edaa15dd00883 SHA-1: 0b986144470a1e274e97b00bc8ad053fbcccecbc SHA-256: baa17ff8660ca507147a178368de025fa2b6c50aac9ddb27ffc5cbfcd6f62f93
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links and a prominent call-to-action button that directs users to a malicious redirector URL, disguised as a 'Coin Master' game hack generator. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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/coin-master-free-soins-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_off00002d8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D8D 26392 bytes
SHA-256: 28b149f148751e940bf4064ef199451185cd7135b9f207bc194e73d5e8596dd5
font_01_sfnt_off00006a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9C 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off000074c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C7 17712 bytes
SHA-256: a621fa0cf6ecf429ccb0e9762dad0d1971a2824e8730eca88621f5efe7e14995

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