Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0869bc0eeeadac…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 21:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9ca2ffbd930e6da5805e315b585c9636 SHA-1: e30cea27ec6ddc80907297a96ad0afbcc9d741bf SHA-256: 3a0869bc0eeeadac9251ba1fd477bd99e8f144cbaeb715c69a14b8cc9d2d4024
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.co/app/431946152/roblox-account-hacker-download-2021-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/demon-roblox_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-roblox-virtual-items-codes_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-phantom-forces-aimbot-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-infinity-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/a-tool-to-get-free-in-roblox-purchases_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/hack-admin-roblox-nante_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-robux-in-roblox-for-free-on-pc_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/can-you-make-free-clothes-on-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
font_00_sfnt_off00002fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22104 bytes
SHA-256: ae2b7aa672dbe1846052225caa07fe6c80cb1daf78c6a9e6ea260d3d9050f1d0
font_01_sfnt_off000060f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F8 19808 bytes
SHA-256: 8275f94f6cebbdf6daed5a15b9db6badb2b24401bb99aeb1b3f478329531a0e1

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