Malicious PDF — malware analysis report

Static analysis result for SHA-256 566882c2315b238b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 20:20:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7a5b8fef453e8c7ad6f0170938e57770 SHA-1: 9263ecbd89f732f9e1e31c9b9ccd32778ea8a445 SHA-256: 566882c2315b238b2dc793008094dc1fec0f9039e35cf33f478f11a02d9cde27
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with SEO link farms and game hacking lures. The document body explicitly mentions 'Coin Master Free Spins' and 'game hack', indicating a social engineering tactic to entice users to click on these links. The presence of a 'PDF SEO Link Farm' heuristic and multiple 'free generator / game hack' redirector links strongly suggests a malicious intent to direct users to potentially harmful content or further malware.

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.co/app/406889139/coin-master-free-spins-facebook-game-hack PDF link annotation
    • https://ktphuhung.com/public/upload/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/hack-menu-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/roblox-jailbreack-hacks_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/free-robloxcom-codes_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/how-to-make-shirts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/free-roblox-wings-not-decal_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/false-dbfp-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/how-to-hack-roblox-robux-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/rbxgg-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://ktphuhung.com/public/upload/files/el-mejor-hack-para-roblox-marzo-2021-tutorial_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
font_00_sfnt_off00002dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC9 23356 bytes
SHA-256: 9791a6ccb03ca2d969fad9d815914057d3126def23354850bd2f07722fb873b9
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 18504 bytes
SHA-256: 60d2bdc76bcd03856ff56843c76a1045165bedbcd3c7078909a454fabf5c0968

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