Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34cd4145b1c312c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 18:18:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 248f7cdf3ac0631cb41823456c8e5eb2 SHA-1: d0495b3384dc6fc445f7f1b98ff10ab4fb48999f SHA-256: c34cd4145b1c312ca7ef84387441261839fa8d28694106af13aea14fd1721c01
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.co/app/431946152/roblox-cheating-sex-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/roblox-free-xploits_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-robux-offers_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/ancient-earth-hack-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • https://foc.vn/public/upload/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/sendspace-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-admin-in-roblox_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F37 22216 bytes
SHA-256: 46d4af6b429931de6b30ade172ee5bf7cdebe2c21420b9f18a7b3ffe088a325b
font_01_sfnt_off00006094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 18876 bytes
SHA-256: 22585fe33fadb4cc85fddb76ddc23a9532e7c6233eee4dc16a7fdb637e89ffc7

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