Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba555080ca2c226b…

MALICIOUS

PDF

38.1 KB Created: 2020-03-28 09:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0fcf2204367c751c98ba58ee6f58003c SHA-1: 7f74ba07ed624cea343429cff61d0275cec65e03 SHA-256: ba555080ca2c226b633043a6d16e9fe94131fef810a9889f67f3363587dc5eb6
94 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary lure appears to be 'Harry potter quiz questions and answers', directing users to a URL on cliffordgenomics.com. The extensive link farm suggests a tactic to manipulate search engine results or to distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cliffordgenomics.com/uploads/1/3/1/3/131379059/131379059.html#harry+potter+quiz+questions+and+answers
    • http://animators.directory/uploads/1/3/0/6/130639791/9013688.pdf
    • http://bikeethiopia.com/uploads/1/3/0/6/130639531/dcfa6945cc.pdf
    • http://www.sandcastlesailingcharters.com/uploads/1/3/0/8/130873923/4312148.pdf
    • http://mountainplayschool.com/uploads/1/3/0/3/130323959/7942027.pdf
    • http://www.ingitravel.com/uploads/1/3/0/4/130475879/9525742.pdf
    • http://handsomeconnor.com/uploads/1/3/0/8/130814339/6898719.pdf
    • http://www.hollyhudson.co.uk/uploads/1/3/0/5/130543466/3355c2fe17b.pdf
    • http://cooskiphotos.com/uploads/1/3/0/8/130814960/1322715.pdf
    • http://msmaley.com/uploads/1/3/0/4/130476564/masejidafojatokal.pdf
    • http://cpanel.dumfriesfirst.org/uploads/1/3/0/4/130435755/8491090.pdf
    • http://hostmaster.bolsoverroofingcompany.co.uk/uploads/1/3/0/8/130814078/0eaced0.pdf
    • http://www.hikeeswatini.com/uploads/1/3/0/6/130604657/5315442.pdf
    • http://freemasoninfo.com/uploads/1/3/0/9/130969079/dbcbbb6.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_off00006cd2.bin
702045adb0e1036f61a0dfe721c7e8ed86f2502958dc6510948be1483473f0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 7844 bytes

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