Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c6f3ae266d11f5…

MALICIOUS

PDF

36.8 KB Created: 2021-07-07 08:50:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 90cec9a0e0e3d855342db8aa980e88fc SHA-1: b2d70d35db1eb38a7559253e07267f1a84f07946 SHA-256: b4c6f3ae266d11f5fe0f8f859433e04c92443e91e3380a98d4b6ba680d4f97cd
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious content. The primary lure appears to be 'Coin Master 400 Spin Link Hack', directing users to http://netcdn.tw/app/406889139/coin-master-400-spin-link-hack-game-hack.

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/406889139/coin-master-400-spin-link-hack-game-hack PDF link annotation
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/boku-no-roblox-free-spin-hack_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-in-edit-game-hack-gui_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-hack-top-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/how-to-be-naked-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/wie-kann-ich-robux-hacken-website-liste_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/roblox-hack-robux-promo-code_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hacks-de-inspeccionar-de-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/hack-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/console-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.alhurriyah1.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.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_off00003a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A35 22620 bytes
SHA-256: f94e3680221be106e12c03b6f2eb3cf6cbadfe2015435573265cd8311d423e21
font_01_sfnt_off00006c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 18416 bytes
SHA-256: 1ea02170fa039feadc22b878a26447d8b78ecb95c887cd867cebd53964f4ae3f

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