Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec84729e0d068bb4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 02:56:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5d8dbac74a91ae5aa66048bcec94bd59 SHA-1: 6d375426b39ab3980705d5b8342a887ca06518bb SHA-256: ec84729e0d068bb4632e057025d9f75b0746e13f6d66cff773a05834e66a7e75
160 Risk Score

Malware Insights

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

This PDF document contains links to a known malicious redirector, disguised as a game hack generator. The primary link directs to 'http://netcdn.co/app/431946152/how-to-hack-roblox-jailbreak-2021-mod-menu-game-hack', which is likely intended to lead the user to download a second-stage payload. The document body and numerous embedded URLs reinforce this lure, aiming to exploit user interest in game cheats. No scripts were extracted, but the PDF structure itself facilitates the redirection and potential exploitation.

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/how-to-hack-roblox-jailbreak-2021-mod-menu-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/download-roblox-paintball-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-script-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-magnet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-jailbreak-hacks-2021-may_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/mouse-script-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-code-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-shard-online-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-2021-how-to-cheat-in-fencing_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/has-roblox-always-been-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-robux-generator-tool-2021-roblox-robux-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hacks-for-windowns-10_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-cheat-engine-fun-commands_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-items-roblox-catalog_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_off0000310d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310D 21996 bytes
SHA-256: d3ca25e62f723ba14b69b43ce59cd229e65d9761d83bf82d338797a56cadd60f
font_01_sfnt_off0000617f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 20016 bytes
SHA-256: 4e7d1060aa2cd57d2814a1d65f6c0e77ac4a173a55c8fe1cfb5514c9e128b0ff

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