Malicious PDF — malware analysis report

Static analysis result for SHA-256 14de8724a307fa13…

MALICIOUS

PDF

37.6 KB Created: 2021-05-25 07:42:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 198141f012dc719925ee6ff9660f8cb0 SHA-1: 4093535447e532c61d3b7ead915c0751dd7d0e43 SHA-256: 14de8724a307fa1394dac3262d334ffbd375f9d7f17c82fba5431f8509d46218
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free Robux" or "game hacks" to entice users. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-for-kids-game-hack, which is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a social engineering attack aimed at driving traffic to malicious sites, likely as part of a phishing or scam campaign.

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/431946152/free-robux-for-kids-game-hack In PDF document text
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://biospray-online.com/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://biospray-online.com/ckfinder/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://biospray-online.com/ckfinder/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.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_off000033e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E9 26572 bytes
SHA-256: 56401b1e8b7222607088402c586ea17aaa66b0aee47237cc9373dd6b591db4e7
font_01_sfnt_off00007185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7185 18308 bytes
SHA-256: 763c1f2cd60606b291f89f2a80f52d083a3bf80be883c0f2186ef0e0ffb8dff5

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