Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83a866c9eb49e38…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 11:14:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b475ff3139b646e0d6e0ed6e7f716e90 SHA-1: 59f372711031f940f6a82321b56b1afae6c03c68 SHA-256: e83a866c9eb49e3842f2a1c3317d791c4b23c40add8c378e34e65e23729bbe54
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm, pointing to sites offering game hacks and free items. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous URLs suggests a phishing or scam attempt. The document body, though partially corrupted, contains references to 'free spins' and 'coin master hack', reinforcing the lure.

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/free-spins-coins-coin-master-game-hack PDF link annotation
    • http://uptodate.az/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-support_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/real-working-coin-master-hack_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_off000046d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D1 25032 bytes
SHA-256: 957099a2e0883d7c8ea793621073d273859609ce084c93e8f92f7da9b01162bb
font_01_sfnt_off00007fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBF 17884 bytes
SHA-256: 18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6

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