Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fcdbd5ce05f63d…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 23:20:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f5182750163f7651cbfd3e009a35e3bd SHA-1: ecb4ae3cc1e28db594e2ed99efde58cf383d7607 SHA-256: 21fcdbd5ce05f63d5162812481e0fad6a8e31637d4e506e654dcf562bfd5d19d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, directing users to pages offering game hacks and free currency for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' lure further supports a malicious intent. The document likely serves as a lure to drive traffic to malicious websites, potentially for credential harvesting or malware distribution.

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/get-free-spins-on-coin-master-2021-game-hack PDF link annotation
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/roblox-earn_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://learning1.misbidayatulhidayah3medan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-ios_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_off0000499c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499C 24120 bytes
SHA-256: 85484cc0de97a9b14e816df1392368eb1a7821e0bc7fb506d4c1a89c92222dc4
font_01_sfnt_off00008098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8098 18288 bytes
SHA-256: 51edae499e96af11139ef94313efcbf906f73cd888d739ca20624da83f1b55af

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