Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38c4e25e96ef5f4…

MALICIOUS

PDF

32.2 KB Created: 2021-06-26 13:22:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c2be6f45875b3c86401b875f6426d88d SHA-1: 9ba481a3ed69283f10fb926b7d34a3ba9504220c SHA-256: d38c4e25e96ef5f4cde364336d88f1ea14127396729a99d7d0981667966a7dfd
160 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, disguised as "free generator / game hack" lures. The document body explicitly contains the URL "http://netcdn.co/app/431946152/botton-complex-free-robux-game-hack", which is flagged as a malicious redirector. The presence of these links and the ML classifier's high confidence score indicate a high likelihood of this document being used to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/botton-complex-free-robux-game-hack In PDF document text
    • http://kierowcyhgv.uk/images/roblox-steves-one-piece-hack-tp-chest_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/hack-para-dragon-ball-rage-2021-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-hack-someones-roblox-password_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/free-robux-generator-xyz_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-get-free-money-in-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/earn-free-robux-by-doin-tasks_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/free-cool-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-stuff_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_off000028e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E4 21608 bytes
SHA-256: 4012a5c4e8356874f054e099eba53443e81ea7af213ece3e181fc9cd5bfbbbc9
font_01_sfnt_off00005832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5832 19332 bytes
SHA-256: 9773344e50a9c7697257a9f6e3b7128c38939047d725169c4a9aab7f593fafa7

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