Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5a3cc525e1c8e4…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 18:28:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 171af74335330b92e0af3138b0487ee7 SHA-1: abcaa8e9042d4bc71e339bc3da493bcc75c18418 SHA-256: 0b5a3cc525e1c8e4dabf11ae185c55edb3a7cc957b784edf17fcb5c46a5df3c8
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/how-to-get-free-robux-without-verification-2021-game-hack PDF link annotation
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/script-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/cara-cheat-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/my-robux_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-free-obc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/pokemon-go-free-levels_GM1094591345.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-books_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/urban420-network-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-promo-codes-real_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/comment-hacke-roblox-robux-pc_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-credit-card-to-buy-robux_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/name-that-character-cheats-roblox_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
font_00_sfnt_off00003182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3182 21920 bytes
SHA-256: 2aafe2ab23544babdf13c21d9a36e7d361b81f9fb154c209d7c17cba49ab9ff0
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 20004 bytes
SHA-256: f525ebf185ff77ca350f82577fc455037f682c9e152adbcdc84b979bf7cf1078

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