Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c5a9c53283d18e…

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 15:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c7ed893c2bc98c34ab65bda2c7e407a6 SHA-1: 829b201c6af067cf42659b92f3e816b340d3ed16 SHA-256: 55c5a9c53283d18e5f7dd2669025b45c63184f660821502f41bef523f5724d01
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 0.9796

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.online/app/431946152/how-to-get-free-robux-easy-hack-game-hack PDF link annotation
    • https://www.jcn.co.uk/uploads/files/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pubg-600-uc-redeem-code_GM1330123889.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005112.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5112 28788 bytes
SHA-256: 3f868d18f76449b2a6f78f131e3da50a7dfde4eabccb1c1703f7a11d80321f49
font_01_sfnt_off0000935d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D48 18860 bytes
SHA-256: ae4481784f2b59baf7f887bcc8933de4398304efe668e0a39e1c63b4066a7356

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