Malicious PDF — malware analysis report

Static analysis result for SHA-256 75779acc4549bdc5…

MALICIOUS

PDF

36.6 KB Created: 2021-05-21 09:50:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 057db3769b2b05d92af59b92768e38c7 SHA-1: 81bc9c6f657083ca66ebc841604c3d84e4bda2d2 SHA-256: 75779acc4549bdc5b42efe4d9c15de3c82c0bca7d962ed05f5067f5d9e007b37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' for popular games. The document body and heuristics indicate a lure to click these links, which likely lead to further malicious content or malware downloads. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-daily-free-spins-and-coins-2021-game-hack In PDF document text
    • http://d-cision.nl/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/how-to-win-free-robux_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_002_off00003401.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3401 24272 bytes
SHA-256: b3b0f7641d4139d1b62fe15c1fc7e1af3db0d039042efaaa4f63a717c9891a69
font_01_sfnt_off00006b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9E 18884 bytes
SHA-256: 183333dfce930995a9382150b407cb528e1a5d3dc22f511d9bca322a4b29e614

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