Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b47ea8480ae0f92…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 06:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ed72c5c7a843862130564af83e4a0262 SHA-1: 2348efb0450b399cc15cb3538c67c24853deb644 SHA-256: 1b47ea8480ae0f9245c9c217835efb74407d0ce916dbbecdac72f7d66c847e8c
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/406889139/how-to-get-more-spins-on-coin-master-hack-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/intentan-hackear-mi-cuenta-de-roblox-lyna_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/nuevo-hack-16sept-generador-de-robux-by-piignoiise_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-rare-name-generator-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-speed-hack-script-v3rmilion_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-app-free-download_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-without-password-website_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/hack-de-robux-2021-100-real_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-o-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/best-free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-obby-not-fake_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-without-completing-offers_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-download-minecraft-for-free-on-pc_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_off00003326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3326 22404 bytes
SHA-256: c5b1945e7f1fb94908816068aedaf9c642facd92777836d2e420c5ec06417dba
font_01_sfnt_off000064ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 18344 bytes
SHA-256: c10bbac0f74f0860f868df31348c10296c9c1874b0e58b464a19f5bbe73675af

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