Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d3391d2f1fde64…

MALICIOUS

PDF

27.7 KB Created: 2021-07-04 10:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5bdd5edd1d44464373c6c9d3b1a80db4 SHA-1: 2cb0496388984e41b8e3078f66be92ce3a21d876 SHA-256: b5d3391d2f1fde64f0e405d554b6d1412c0ce0b8c95d44535e18eb5f2589d952
74 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. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • 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/431946152/bux-free-robux-game-hack PDF link annotation
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-games-like-minecraft-that-arnt-roblox_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/roblox-hack-free-clothes_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/armadyne-industries-free-roblox_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/get-free-robux-using-no-surveys_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-dominus-userscript-roblox_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-copy-and-paste-2021_GM431946152.pdfIn PDF document text
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C4 22360 bytes
SHA-256: 05102ecf0ee7442055abfb80702ddb1682207c0f1df61f8a1edd17c81ede9f1b

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