Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3f634d3cf87410…

MALICIOUS

PDF

40.3 KB Created: 2020-03-22 03:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eaa65b30979a4701f1bdd54ad49a202c SHA-1: 3292c0ace7701dc6fbb290c7b4a783bca4b01c4b SHA-256: de3f634d3cf874100a3c0f44e63d577ff735635a18fb7f9da840037beb1a1a26
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a link farm, containing a large number of external links to various domains. The primary intent appears to be directing users to a multitude of websites, potentially for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://gregoryfineart.org/uploads/1/3/0/8/130874125/130874125.html#10+palabras+que+comienzan+con+la+silaba+bra
    • http://qgility.com/uploads/1/3/0/6/130604560/xivojur-verobuvevexudat-dezexoniban.pdf
    • http://www.cloudsecuritycongress.com/uploads/1/3/0/3/130323738/30c49e.pdf
    • http://chapelhillchamberacademy.com/uploads/1/3/0/6/130639452/b36d75ac0e.pdf
    • http://bestforexrebates.com/uploads/1/3/0/3/130313366/79518.pdf
    • http://jeprysfurniture.com/uploads/1/3/0/2/130273766/637231.pdf
    • http://minagcapital.com/uploads/1/3/0/7/130739816/3593769.pdf
    • http://mta-sts.mail.teganpoo.com/uploads/1/3/0/6/130604708/kajixonixujal_jivoratefu_simana_roxefopakobog.pdf
    • http://purebarretexasstrong.com/uploads/1/3/0/7/130740232/688232f5199602.pdf
    • http://dremilyamos.com/uploads/1/3/0/2/130272496/vixegukup-zifepejuva-bogadufod-ruzabo.pdf
    • http://triosdigital.com/uploads/1/3/0/6/130620546/65a96.pdf
    • http://www.joeburritos.com/uploads/1/3/0/9/130969085/gujaxuduxidapiwo.pdf
    • http://nyanyaekaterinburg.ru/uploads/1/3/0/6/130639351/vajorarunefi.pdf
    • http://idabzzz.com/uploads/1/3/0/5/130552073/vixug.pdf
    • http://dirtbagmagazine.com/uploads/1/3/0/8/130873990/6858166.pdf
    • http://worthlarose.com/uploads/1/3/0/8/130813366/sebonu_soretafusa.pdf
    • http://webmail.store.wabashfriendscounseling.com/uploads/1/3/0/5/130545985/21bfb.pdf
    • http://stantonroadspecialtygrowers.com/uploads/1/3/0/7/130775116/lulokokavagimi.pdf
    • http://missiris.online/uploads/1/3/0/3/130379181/8837520.pdf
    • http://thekrymsunkruzer.com/uploads/1/3/0/6/130621749/21962c.pdf
    • http://bosslessforever.com/uploads/1/3/0/6/130605278/8709759.pdf
    • http://elkinsgeometry.com/uploads/1/3/0/7/130738989/jojemujudomisup_miguseneno_xexavo_pezemojaxut.pdf
    • http://antoniacundy.com/uploads/1/3/0/5/130588928/8968a8d77a8.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_off000071ff.bin
75cf62372ae026398ebb05cf6c8860d0dd9cd354b58eb34af1ab2ba26e3f5410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 8700 bytes

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