Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05243d5b2ae6391…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 14:38:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 57afbbbf055fb1c2f93f97afb2b9c7a8 SHA-1: 14f3cac67fefa8e56eddaae0c9e4580587fc0e94 SHA-256: d05243d5b2ae639125aa3cac439ec886303b16efd61cf6e685e446fd1c15169d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirectors and 'game hack' lures, indicating a phishing or social engineering attempt. The document body and heuristics confirm the intent to trick users into clicking these links, likely to download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9408

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-gold-cards-hack-game-hack In PDF document text
    • http://www.nicoifruttidelchicco.org/images/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003cdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CDC 26300 bytes
SHA-256: 4c94e64138c4ea466b4c6f8c3930664a708d3f89602af9c702be0a07c4d30c32
font_01_sfnt_off000077c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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