Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2449257796c039…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 23:12:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e457370e0a94cc9477b04e26c92e465b SHA-1: fe8e473c127ea00ac8b16ee3014abd7d12d03583 SHA-256: 6b2449257796c0393ef315b2ae83b916e510acbd58cc2c56e9f70915027aea65
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to appear as generators or hacks for popular games, such as TikTok and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The primary URL, https://netcdn.xyz/app/835599320/tiktok-free-pc-download-game-hack, is likely the initial destination for such lures. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/835599320/tiktok-free-pc-download-game-hack PDF link annotation
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-link-facebook_GM406889139.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
stream_003_off00004a40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A40 24164 bytes
SHA-256: 8a19ebcdf795d938a2f8d917d66f17c9802d2add7abaaf2e8a78daffcc972c1b
font_01_sfnt_off00008007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8007 18416 bytes
SHA-256: 3bc66693f37bb88c351ddd1f3f67023f336a4643d11d38b6f2f309d0f79f38d1

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