Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f81edcf63258b6d…

MALICIOUS

PDF

39.3 KB Created: 2021-05-24 17:09:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa2821f3169104c89340c620c8bab62d SHA-1: e68395f8446783666ab5e217d807fc8cd5fec9a4 SHA-256: 4f81edcf63258b6d18821dbe33c7ec8298f989953a0152c8f87f2df52e8c774f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, specifically a site offering a 'Minecraft Windows 10 Hacked Client'. The document body and heuristics confirm the presence of malicious redirector links, indicating a lure to download potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game hacks to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/minecraft-windows-10-hacked-client-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-apk-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003441.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3441 25524 bytes
SHA-256: 0c3a23fb98a5d596328b525f79bb7296eeab5dda8910f23a9fd8d4c184d18ac2
font_01_sfnt_off00006cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC9 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off0000766f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766F 18768 bytes
SHA-256: f9a71ab68452ae4ccd094805e59123059ba28481ac44c73a337d9a6d18fc1d00

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