Malicious PDF — malware analysis report

Static analysis result for SHA-256 abacf2c2b253c7a4…

MALICIOUS

PDF

35.3 KB Created: 2021-05-13 07:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e4b179e68eb43b01e18e726491f3c2a SHA-1: 345698e3bc7617cddded1cf940241b13c661401a SHA-256: abacf2c2b253c7a481d36ce85c55913716ecce733432eb245af1122a8b7919dd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a "Coin Master Hack Spins" generator. The presence of a download button lure and the redirection to a known malicious URL strongly indicate a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-hack-spins-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_off000032a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A0 24048 bytes
SHA-256: 591767b3c7b74afd1409b9c1dcf85f0a76d522bff8414aadb12ca2402b75f355
font_01_sfnt_off000069b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B0 17892 bytes
SHA-256: 340cad640208a3f63c565dece8f0e8a86db030e36dd2ab9bf46956c7901539b7

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