Malicious PDF — malware analysis report

Static analysis result for SHA-256 568e4260bf467b1d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 03:46:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 58a4a091a8b11f20e73ff3f183c0ca78 SHA-1: 18d4cb4c3153292eacd78fc0d36f4b61c9b81e2c SHA-256: 568e4260bf467b1de9fb9221b82d9bc6d7a3512febbae471f4c015f766f0e1e8
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/hack-robux-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-codes-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-rewerds_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-area-14-hacking-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-hack-gems-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/mathep_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-shiny-teeth-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-giveaway-group_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-exploit-dll-scripts-cheat-engine-pastebin_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_off00002eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEE 22280 bytes
SHA-256: 38abdc6a4fe2e605ae6a1488c4f0abc36c35a377cc9bf7df4ef8a8792d5161e2
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 19124 bytes
SHA-256: af77b6b8153e1832c5efaff6712364c04c1dd45c9e9ccf844d82674581f7f50b

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