Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dc740f52912b4a…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 12:25:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6c1b383f99ae14376ad046f48f25c7fe SHA-1: 13d619ededc0cb5a50cc336361befc8d9270ce1b SHA-256: 30dc740f52912b4a1ddfbdd91cb1b8589c9bfb821a094945cabe4876e4e3f6d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/406889139/coin-master-free-spins-link-download-game-hack PDF link annotation
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-robuxzone-wordpress-com_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-hack-with-proof_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/picture-roblox_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-hack-genwrator_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-renders-free_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/robuxian-youtube-page-secret-claim-free-robux_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-high-jump-hack_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-hack-999999-robux-2021_GM431946152.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/pokemon-go-free-643_GM1094591345.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-hack-apk-35-33_GM406889139.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_off0000330d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330D 23476 bytes
SHA-256: 602232fa80c45b3d505883b29b1a14b8595ff90265768527e620259b53f56792
font_01_sfnt_off00006822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 18924 bytes
SHA-256: a4bb17e2b546a4d7fe34b124958f87fb40140c6e90ac4756c30edd8d3bfebad3

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