Malicious PDF — malware analysis report

Static analysis result for SHA-256 9002111863b19274…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 10:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 217e91d461af59679608b69cc6f78810 SHA-1: 4a5b07c8eb804dbb0e8b9859d7542ada44ccf3de SHA-256: 9002111863b192743cd56e4cd8e6cb1a7f75c46bbf4a6868aec83f557b8fc828
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-hack-robux-infinito-download-pc-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-roblox-for-robux-no-survey_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/enter-password-for-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-phantom-forces-credit-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/troll-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/boga-boga-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-100-real_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-no-password-needed-or-verification_GM431946152.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/free-robux-codes-not-clickbait_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-exe-editor-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/blox-pice-roblox-hack_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_off00002e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0B 21992 bytes
SHA-256: d1071cfd8c438123f5bfb825827e94eb5410da938fa06f20c39c32918a618d47
font_01_sfnt_off00005eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB1 19680 bytes
SHA-256: 351038bc3fb8f9909b1cec5a07501670eef27cd55c27419a88c904bef828a710

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