Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f7526fe49114cb…

MALICIOUS

PDF

38.5 KB Created: 2020-04-12 07:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6cb7c43597ce6d7221e3b58099bd8e92 SHA-1: 4de9ed65005d7f47a7ef3223a0978d05a3fd6b3f SHA-256: 27f7526fe49114cb140ac1cc2ff7d52eaedae002f9a81047862b451a9ad3ff54
62 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, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The document body itself contains text related to English grammar, which appears to be a lure to disguise the malicious nature of the embedded links. No scripts were extracted, but the primary attack pattern involves redirecting users to a network of potentially harmful URLs.

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://thebusinesstip.com/uploads/1/3/1/3/131383917/131383917.html#ejemplos+de+oraciones+con+verbos+regulares+en+presente+en+ingles
    • http://coachcollinsfootballcamp.com/uploads/1/3/0/2/130289571/pupebuwa_lenemetatu.pdf
    • http://thepostellexperience.com/uploads/1/3/0/3/130313531/sedamibaro_pubarafow.pdf
    • http://issakasoccerfootball.com/uploads/1/3/1/4/131454808/vodufunujojax-sutop-pijewewubaki-sebisepin.pdf
    • http://yournaturallybrightpatiocovers.com/uploads/1/3/0/6/130604804/gefuvevela.pdf
    • http://theamericanandthebrit.com/uploads/1/3/0/9/130969216/08f0a36.pdf
    • http://webcamthong.com/uploads/1/3/1/4/131438495/movedejiwalef.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d88.bin
90d43673a08e0fd5bb3fcb82ffe2fd6e0f35da3d75c5ce3ef248a78359da9f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D88 8308 bytes

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