Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee34aab7f8cc53d…

MALICIOUS

PDF

33.3 KB Created: 2021-07-01 09:17:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b7e79185a7a8641617b6ce7f0160f9f SHA-1: d098edf43a36e68caf5cfa8e7a0b60a3aea90192 SHA-256: 6ee34aab7f8cc53da2e3fcaa0d0166b253498b11b6c397c92548e29cdd1e79da
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-roblox-hack-no-survey-no-human-verification-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/echter-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-any-person-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/design-it-hack-scirpt-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-community-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-bloxburg-beta-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/ro-cash-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-meep-city_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheats-for-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hack-para-jailbreak-roblox-2021-money_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.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_off00002d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D99 20816 bytes
SHA-256: a0a4d5835c0c9e5df126cce5b62e7ca6fdcbaad2f472335d70a6e6109085e3c3
font_01_sfnt_off00005a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A89 19872 bytes
SHA-256: 8099884fad2aa7ece153cfa9e159706b0f192b9cd16368dc39f2e54b6e65898f

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