Malicious PDF — malware analysis report

Static analysis result for SHA-256 7936faf5721ff023…

MALICIOUS

PDF

39.8 KB Created: 2021-04-30 23:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e60670fab1c38a1a21ade838b60e07d8 SHA-1: e669da8c088c8f1dc9ba4a3470e7f30ddd8443fa SHA-256: 7936faf5721ff023a58142bf88773cd57b7d35c75afb8d7c62bc68656a8e2bb1
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks. The document body and heuristics indicate an attempt to lure the user into clicking these links, likely to download a second-stage payload. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/hacks-for-roblox-jailbreak-2021-game-hack In PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/hack-vehicle-tycoon-roblox-codes.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-hack-wideos.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/descargar-hack-de-roblox-jailbreak-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-june.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-hack-work-at-a-pizza-place-roblox-2021.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-console-robux-hack.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/how-to-make-clothes-in-roblox-for-free.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/roblox-hunter-x-hunter-lvl-hack.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/do-you-want-free-robux-get-unlimited-robux.pdfIn PDF document text
    • http://beesengineering.com/uploaded_files/userfiles/files/free-robux-paest-bin.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_off00003f92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F92 24940 bytes
SHA-256: 208fa76fc688fedcbaf49053adbe5858709e95c2e124438925483363215c66a8
font_01_sfnt_off00007756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 19036 bytes
SHA-256: 80c137f89de2937ff58413fe4c28b5c40cbfca54fe2d62981bcf6e96576e2140

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