Malicious PDF — malware analysis report

Static analysis result for SHA-256 967e6833028ffe85…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 10:42:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6bedb83b4d2b164259a296d917301b43 SHA-1: 2725d554699dd92ca4a62303595f9f93d49e596a SHA-256: 967e6833028ffe855231b6f6581d725a245138328210616100deb60799f4a581
220 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on what appear to be game-related hacks or generators. The primary link, http://netcdn.co/app/431946152/como-desbloquear-un-cuenta-hackeada-de-roblox-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a scam aimed at users seeking in-game advantages, likely leading to further malicious content or potentially exploiting vulnerabilities.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/como-desbloquear-un-cuenta-hackeada-de-roblox-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-u-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-almost-any-game-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/can-you-get-away-with-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-cool-stuff-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/jailbreak-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-password-hack-tool_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-champion-shirt-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/fighting-free-card-coin-master_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_off0000316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316E 22616 bytes
SHA-256: 6a4bc7b7cec6bcaa5b2ab24bef4d53affa78dff2dce2636c0206ef8956769138
font_01_sfnt_off000063d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D9 19672 bytes
SHA-256: 3352609705dd00b562713862e56c82c00b96f7eb577786128c9681e6ad44f042

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