Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faa6327f14c96c9…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 03:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e24818cc44156dcd10a0b284b08a24f SHA-1: 9255264f7e9ccd27be0d29f973e7786ad8111250 SHA-256: 5faa6327f14c96c993ba3f8fe46b80387bd8bf53320e268b1b9a89e089a28716
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 0.9969

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-no-human-verification-generator-game-hack PDF link annotation
    • http://www.3d-gold.com.hk/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/coin-master-free-raid-link_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_off000048c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C8 26556 bytes
SHA-256: 48b49c0afbff9a80bb2e44b549390ba77b0809afa71ecdba6204105a3accb571
font_01_sfnt_off00008666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8666 18860 bytes
SHA-256: d7f1bf4664d5c073c741d68610eb5dcf28a8fd63084b2bf56aee4ef09f8af4a0

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