Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f65329c059e00a…

MALICIOUS

PDF

41.1 KB Created: 2021-05-01 04:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 488c3288fe9dd5a1309b1b32549d5aac SHA-1: 5a33e87535066d7aba32a677927345d5edf83be0 SHA-256: e4f65329c059e00a4487b59939812f9f5fc64904b9e78a805f2fc9bff16b1f13
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and game hack lures, designed to entice users into clicking. The document body and embedded URLs suggest a scam related to free game currency (Robux). The ML classifier also strongly indicated maliciousness.

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/robux-hack-no-verification-or-survey-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-codes-2021-and-how-to-imput-them.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-rs-free.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/terminal-railway-roblox-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/100k-robux-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-robux-2021-unlimited-robux-and-tix.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/diamond-roblox-hack-jailbreak.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-xbox-one-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-2021-no-scam.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-builder-club-free-code.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-how-to-get-builders-club-for-free.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_off00004339.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4339 25400 bytes
SHA-256: 0cccf6e68bc02d94caca58dcff579a73aa4537bd5641c900d7bb6716483babbe
font_01_sfnt_off00007ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCC 18900 bytes
SHA-256: b13002360e95c005764e4a8de0937246a5c38bc3bbecee658c38901716929616