Malicious PDF — malware analysis report

Static analysis result for SHA-256 da46627fb3e88dde…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 04:44:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dc6383cc9874f27205c02ff99f6260ee SHA-1: c69d20a9e20a02b9d37597c69d25b8f0b27c1635 SHA-256: da46627fb3e88ddea752c76fab8a8f844abb35ee3c2856474cdba4124ae47360
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 0.9980

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 http://netcdn.tw/app/431946152/a-lot-of-robux-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/free-robux-card-codes-live_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/pain-exist-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/gift-roblox-com-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C6 22984 bytes
SHA-256: f06e490d3f54779395ac8a6fe786a3d32301e9c30e8de0ae728b63e929ed7585
font_01_sfnt_off00006578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 18656 bytes
SHA-256: d04e08575e4efc43ec371b195521181e13837c014caa8c6a2ad7539eeb3e7d8e

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