Malicious PDF — malware analysis report

Static analysis result for SHA-256 784831c039ac0ea3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 07:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9c728a9bd777e0a7125b170386ec6f1b SHA-1: 720b279f75b71020b659db498d904c97a2527d5d SHA-256: 784831c039ac0ea3ab8f72329271dd09bc78589edd660aa88ea3bc020e0aa97d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/robux-free-com-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/robux-free-com-game-hack In PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-cheat-robux-deutsch_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-put-in-hack-on-any-roblox-game_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-roblox-promo-codes-com_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/dbo-roblox-stats-hack_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/discord-server-roblox-hacking-community_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-hack-dantdm-on-roblox_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-village-cost_GM406889139.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
font_00_sfnt_off00003014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3014 22396 bytes
SHA-256: 3e3a0c4404ec02958e19a10c217413d0b23585f92b5fff7a0aa142d792a8f4af
font_01_sfnt_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 18976 bytes
SHA-256: fb86ad1aad47c5a5c5fa913efd771066ff8edf92cff8bf075126ed023f1935f6

Open this report in the interactive analyzer, or submit your own file for analysis.