Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a4f207c3bf1e1e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 06:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f02248a5fbf3eb3e5009fa56f8df51bf SHA-1: 0ec8beba08fa6012e61b63b0d0601d5b010c2e51 SHA-256: 70a4f207c3bf1e1e71ca3fdbaca50b1d54e9b2c9f8afe64f2c4ec33be217bee4
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.tw/app/479516143/minecraft-windows-10-edition-free-download-game-hack PDF link annotation
    • https://klp.com.tr/inc/uploads/userfiles/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-roblox-accounts-2021-august_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-codes-28-seconds-long_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-cheat-robux-2021-easy_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_off00002feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEB 22212 bytes
SHA-256: 8aba757cb58272833e0232f8886256a43a3d85bde09e95f80892cab04307e5b8
font_01_sfnt_off000060d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 19056 bytes
SHA-256: 1fbd96916373957abb899fec4ad8fc3866d81e0306805064b2b02ab8661ee979

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