Malicious PDF — malware analysis report

Static analysis result for SHA-256 786798ff2ad24363…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 22:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ab9cd183bd301134e81750349f9cd354 SHA-1: 85819106b0c27a37ac4398b42e488f2dcbe72b57 SHA-256: 786798ff2ad2436397698947f498241ab48e7a7c41cfa27bfc25984dcbf5f0c6
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/coin-master-stop-attack-hack-game-hack PDF link annotation
    • https://khavarrooy.com/assets/uploads/pages/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/script-for-teleporting-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-website-no-scam_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-get-free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-dragon-ball-future-online-script-hack_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3221 22328 bytes
SHA-256: 2962aa4f59a202296bcbabb776f7e65a4b8a0c0c43b42628fbdc1f40ece6b4fa
font_01_sfnt_off000063ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA 18180 bytes
SHA-256: b1b9747a848d73205401646fbd718c8c1bd2deb8ea30ebe3759820114ba25220

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