Malicious PDF — malware analysis report

Static analysis result for SHA-256 04dba645320ebdfe…

MALICIOUS

PDF

43.5 KB Created: 2021-06-02 11:58:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 642311a5c3e25ef374595ab90b8bbd6f SHA-1: 7c7ed4b405c7dd5007184dd356665e6f6f062430 SHA-256: 04dba645320ebdfeaea50db77bae947656b1e292576a994736af0fbc3008a0d4
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 0.9865

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-robux-and-tix-for-roblox-game-hack PDF link annotation
    • https://lita-lb.org/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/robux-come_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/krnl-roblox_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/tiktok-free-view-40_GM835599320.pdfIn PDF document text
    • https://lita-lb.org/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/tiktok-free-view-iphone-theme_GM835599320.pdfIn PDF document text
    • https://lita-lb.org/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://lita-lb.org/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lita-lb.org/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lita-lb.org/images/what-is-exploiting-in-roblox_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_004_off00004df8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF8 25424 bytes
SHA-256: 633bbaaf5d3d9df4e86a3269731dab002ae8ce5f34a219d098a1aba65f012b08
font_01_sfnt_off00008723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 18384 bytes
SHA-256: 0b1c7389a5246e04f5dea5b1e237fad235da92fa9dcbb1cc75de4f3d72af02e9

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