Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fea7bdf6be3fa6…

MALICIOUS

PDF

42.8 KB Created: 2021-06-13 22:19:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 01d7d514c90e92db6762ad05a18a4d10 SHA-1: d05f7fda781ab216eda34d4b388b630d5d234d3d SHA-256: a8fea7bdf6be3fa616f687a5facf0a3ef47d698690243dc5886849211152ea6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded URLs that redirect to a 'free generator / game hack' lure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-pet-simulator-noob-vs-pro-vs-hacker-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-haur_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/badge-giver-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-pa-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-rthros_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.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/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://discordIn 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_off00004a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A10 24728 bytes
SHA-256: 4d3bbbf67c725ca04bcb3a58484a1c17900dc2ffb2d3007649079570443de38f
font_01_sfnt_off000082bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 19096 bytes
SHA-256: 4ad53e15e70543b050d04d8e317473acdd134ccfb8da3123b032ef05bcd23175

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