Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42af45ed516515f…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 12:31:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0581d252dd4eb58c6e07394d94942391 SHA-1: a498a2d7331b3aa07b383fde81270cd324b0bc80 SHA-256: b42af45ed516515fec30db754871a07798dfa83ab83c3946b0bb431a97ed0845
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized and point to 'free game hacks' or 'free currency' lures. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spain-game-hack, is also a game hack lure. The document's structure and content suggest it's part of a link farm designed to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spain-game-hack PDF link annotation
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/roblox-ninja-legends-hacks_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/roblox-cheat-table-scripts_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/pubg-30-uc-buy_GM1330123889.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/hack-roblox-rocitizens-dinero-infinito_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/roblox-hack-tools-download-2021_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearningmtsn33jkt.net/__statics/gudangsoal/files/can-you-give-me-free-robux_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
stream_002_off00003316.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3316 23248 bytes
SHA-256: cad617571b5ee8b64367da102d910aede3a5d1b879824ec3e2871ae54f2c697f
font_01_sfnt_off00006740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90

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