Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b152efc135668f…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 02:01:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9140960ec01a8c76a8e1e97b0e7f72f4 SHA-1: 4a9a2dca2bc4e22391f2e4364eb377abbab7e282 SHA-256: 89b152efc135668f916480b3c8fb8f9087e4a309de638f498eb88629da4946ee
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to websites related to game hacks and free items, with one primary link pointing to a known malicious redirector. The document's structure and content suggest it is part of a phishing or scam campaign, likely intended to lead users to malicious sites or download further malware. No scripts were extracted, but the PDF's nature as a lure implies an initial access vector via spearphishing.

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/good-free-items-on-roblox-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-know-if-ur-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-installing-apps_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/lynx-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-gamepasses-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/haktuts-coin-master-free-spins-2021_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_off000032e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E3 22316 bytes
SHA-256: 11f2792f5824aa840fa3d9f68ffd51d544d81b3f371ad67643bbc3bc2d9ce294
font_01_sfnt_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 19004 bytes
SHA-256: 07a74d473e257e0b66d2dd4cda85c52e7b164c48407c98a1175e90e13e5558f1

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