Malicious PDF — malware analysis report

Static analysis result for SHA-256 af150439732d7651…

MALICIOUS

PDF

41.2 KB Created: 2021-04-26 21:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f0d9a667f62fd0c6ace60b2cfe8cf560 SHA-1: 1b330e137f4df3e11e66f55f47dbae9b1f0efe6f SHA-256: af150439732d765101263ee1c9dce5ef971d7e6455303959bff10fa9f166ffb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'Robux Hacks' and 'game generators', a common lure for phishing or malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the primary URL as belonging to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/robux-hack-trackid-sp-006-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-your-old-hacked-roblox-account-back.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/fps-hack-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-hsck.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-free-robux-without-downloading-anything.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-chaos-washers-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/do-you-want-to-get-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-2021-no-human.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-your-hacked-account-back-on-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-use-cheat-engine-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/generator-robux-free-2021-sans-verification.pdfIn 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_off00003f3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F3F 26392 bytes
SHA-256: 892c49f3fca88a301ac55140f9201339d45d719e7517c33188a94c446e845ecc
font_01_sfnt_off00007cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC6 19092 bytes
SHA-256: 28bbc4383a7e154bbf30a7a63962feb5eefb17e39b4297749b3681aadf1d6b51

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