Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab92a6e56a0a8096…

MALICIOUS

PDF

43.8 KB Created: 2021-05-15 23:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cfafdeae3041061f874e1a1f80771d83 SHA-1: 156860a5c1f0168bb65b981e8593ceeb2452ba4f SHA-256: ab92a6e56a0a809698187b42eca0434ec0631854ed0c337661f57b0d66c00ca8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

  • 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/406889139/coin-master-free-download-app-game-hack PDF link annotation
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/robux-generator_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.kis.ac.th/kis_international/assets/uploads/img/all/files/how-to-get-free-robux-2021_GM431946152.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
stream_003_off00004d9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D9D 25624 bytes
SHA-256: ec40065d203346fdf7602440c97a08fac342323a48aae5699e4281443bc9b1ad
font_01_sfnt_off00008861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 18464 bytes
SHA-256: 707f6cdc96ab39b500be18419555e7a9cc74e7164cf2d3c35a5692c5f811a1f3

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