Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3953183da1dad14…

MALICIOUS

PDF

42.9 KB Created: 2020-06-11 20:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1e6f814690fc349ec6b8e9118af81b7 SHA-1: 2f38ff4faf4b24f6fe44fa1e87836d1160443368 SHA-256: c3953183da1dad1404ab3149a45a9d891254540abf166263c2446f7e8507866b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a link farm of 28 external PDFs. The ML classifier also strongly suggests maliciousness. While no scripts were extracted, the sheer volume of outbound links points to a deceptive or manipulative purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cww60.bpmtc.com/uploads/1/3/0/9/130969981/130969981.html#church+nursery+guidelines
    • http://equineperformanceservices.com/uploads/1/3/0/8/130814235/50086ab89022.pdf
    • http://carlalanmaguire.com/uploads/1/3/2/3/132303219/0815a3e49efa5.pdf
    • http://hostmaster.gruenerinnenhof-laim.de/uploads/1/3/0/5/130539229/3563873.pdf
    • http://glamandtaninc.com/uploads/1/3/0/4/130478772/zanujefujuruzik.pdf
    • http://tiffanyeisner.com/uploads/1/3/0/7/130776304/eb13501ad44.pdf
    • https://toxuluva830071386.files.wordpress.com/2020/06/45636537373.pdf
    • https://virolerimepe.files.wordpress.com/2020/06/bomijaxuzikakuxi.pdf
    • https://popitaje243513875.files.wordpress.com/2020/06/bopusesugobifenu.pdf
    • https://lofamanu.files.wordpress.com/2020/06/69250380807.pdf
    • https://bubigimuma.files.wordpress.com/2020/06/46072767215.pdf
    • https://limigit.files.wordpress.com/2020/06/kasiwapitisonosajoxok.pdf
    • https://jejiwivu.files.wordpress.com/2020/06/97445872261.pdf
    • https://foduron.files.wordpress.com/2020/06/98017365518.pdf
    • https://detixuge.files.wordpress.com/2020/06/48057495583.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ed.bin
a5f80291b6883e290c2f385e9044c6496e451e337616c04dc627daded0b7779f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 10140 bytes
font_01_sfnt_off00008ae3.bin
836ab3fafa1d23e35e14e192ec86be8fe8e931eee4b8c79d5c7bf23088570f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 16136 bytes

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