Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a33a2cb280c86f…

MALICIOUS

PDF

42.5 KB Created: 2021-05-15 13:39:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 40aee4facf58641ab96a6555f67d8503 SHA-1: f10ae8674ac514bc21ceea5a18da28218d87c4cc SHA-256: 92a33a2cb280c86f1b4e567fdaca7252421b7774340ec3644a28aff0c24105fa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to pages offering "Coin Master Hack" or "Roblox Robux Free". The presence of a "PDF_SEO_LINK_FARM" heuristic and the ML classifier's high confidence score indicate a malicious intent to drive traffic to potentially harmful sites. While no scripts were directly extracted, the document's structure and embedded URLs suggest it acts as a lure, likely leading to a malicious download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/coin-master-hack-activegamer-game-hack PDF link annotation
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/20210-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA3 24660 bytes
SHA-256: 44fb01cec1a3567d8747bf7b21bdac024275452b88f31a93939e6dc7126912f5
font_01_sfnt_off00008381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 18376 bytes
SHA-256: 7942159ea88d166bbca90a684af9c7642873a6db171e4c543e33bc315b6ed94a

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