Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31e49effd70cb80…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 18:49:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e511cce69c8288c07f11f25a5713e7c4 SHA-1: 6b36111a32da5c3d88acbccfcdeea994d7d89767 SHA-256: c31e49effd70cb805e24633ab9b7ef7c20e155adc60957780bef58406bb3bd49
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of links to external resources, many of which are algorithmically generated and appear to be SEO spam for game cheats and hacks. The presence of a fake CAPTCHA heuristic suggests an attempt to trick users into interacting with the document, potentially leading to malicious downloads or phishing. The document's structure and numerous links indicate a likely attempt to drive traffic to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 6

  • 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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-promo-codes-free-robux-game-hack
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-32-hack-apk_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-vip-server-roblox_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-daily-rewards_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-games-online-free-no-download_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-new-link-free-spin_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-do-u-get-free-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-no-verification-2021_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-without-human-verification-india_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-spin-link-hack_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-avatar_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-roebucks-no-human-verification_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-gift-card_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spin-now_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id//repository/minecraft-net-download-free_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-aimbot_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005426.bin
ab96e14c0cf6b70f60aa83de408a98066560b0104a9d11044d28891d2df39fa6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5426 26380 bytes
font_01_sfnt_off00009261.bin
3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 18676 bytes

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