Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe9ff9a541ade37…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 07:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1b8b80e4965dcf6bad368dee794f581f SHA-1: ab41a8c94ad338878b8163521aee356245ed1c31 SHA-256: 2fe9ff9a541ade37a1c66b4dafd832fb02708cd05b903f47e299cddb297bc806
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 0.9969

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 https://netcdn.xyz/app/431946152/free-executors-for-roblox-game-hack PDF link annotation
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://xn--80adfcepoood1a3b.xn--p1ai/images/roblox-free-rubox_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
stream_003_off00004b8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8E 25900 bytes
SHA-256: 6f41175950aa092355fa6ca15d59460256d61fa6943ac5c1fd899643567c63bb
font_01_sfnt_off000087d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D6 18192 bytes
SHA-256: 0010e8e9d3b2fa3a2033abb01eb6105ec98c225a2498b2eb90ac9377a6b08ddc

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