Malicious PDF — malware analysis report

Static analysis result for SHA-256 6087d66701fd2268…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 06:16:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 43290cb2fd3dde79d59765a5a8530467 SHA-1: 1a7203d0080b9ff2b75132b0b6e02344603ffb67 SHA-256: 6087d66701fd22688774f30a5a2321d818ccdb8acc386cc46c25793e2149974f
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9632

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/coin-master-game-free-play-online-game-hack PDF link annotation
    • https://semanasantacehegin.com/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/free-robux-place_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://semanasantacehegin.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://semanasantacehegin.com/images/coin-master-hack-tool-no-survey_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F5 24772 bytes
SHA-256: e78a27d8ec0ca20d76ff5fac55a97667d7cdeed3864d344f4dc276cabb313061
font_01_sfnt_off000081eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 18380 bytes
SHA-256: b5bbbc623ea736b659451b361c4225dcdb8ece8dfba16a3ff4312aad2e8470ed

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