Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca1aec6c320924d…

MALICIOUS

PDF

46.1 KB Created: 2021-05-13 07:00:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d6dc621ef70f6fbf8e379b8623db123 SHA-1: 16c6153db31be7625f54f09c77739f555ffffc5b SHA-256: 0ca1aec6c320924d5ae1b3f4fb6cc3dafd6a10b15661334af3876af77f882a80
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 0.9432

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 https://netcdn.xyz/app/431946152/free-robux-no-verify-game-hack PDF link annotation
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C45 25512 bytes
SHA-256: dc38301453e5d881319ed51dbe08957735d991f26602d59197dd5efe41cdf915
font_01_sfnt_off0000877f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000912d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912D 18448 bytes
SHA-256: c82a2e535d1b02ce633786be567827726fc21df48f71ae9cb05a1d9866072f5e

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