Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3cfb89ed276ea5…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 11:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6f5b369d37d4aaeb8ce1bacdd9e94db SHA-1: acebeba1caa781948826d3f0d90f3b73ad5b4848 SHA-256: dc3cfb89ed276ea5cb9e4e493ee0f65dfbcd2420ef1af3575064c91ab8d4c69a
180 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and IP addresses, disguised as 'game hacks' or 'free generators' for popular games like Roblox. The document body and embedded URLs strongly suggest a lure to download potentially malicious content or visit phishing sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-how-to-get-free-catalog-items-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-how-to-get-oakley-roblox_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/roblox-jailbreak-hacks-transparent_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/btools-hacks-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/www-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-irobuxcom_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-apple-mac_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-in-2-minutes-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-account-2021-new-method_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-andrbirds-head-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/microsoft-free-robux_GM431946152.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_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22196 bytes
SHA-256: 00c3960f9c65bb15f01833eb710a16ba1c7accd34f11c9b6a0606fad4a13ac5a
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 19176 bytes
SHA-256: a132bd69f40b501ba42fdb71296978d1ee7c97e12ce0b68c9862ad69312c9bee

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