Malicious PDF — malware analysis report

Static analysis result for SHA-256 35049de11a572253…

MALICIOUS

PDF

43.0 KB Created: 2020-04-10 08:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f36ea1b985d7e975b6c846a0a6abace8 SHA-1: ad15ca6ade035008467348ccff85d6f013f7d11e SHA-256: 35049de11a5722533b55a4632dcad0129e33710c7a4275bd3912164ccc3af044
94 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains a title related to event organization, but the primary malicious activity appears to be the extensive link farm.

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://morningpeople.club/uploads/1/3/0/7/130739852/130739852.html#que+es+organizacion+de+un+evento
    • http://montasymidtown.com/uploads/1/3/0/5/130550684/lawewafojogavekeseto.pdf
    • http://outliftmuscleandfitness.com/uploads/1/3/1/4/131406600/lafowukaji-duzulimupobikiz.pdf
    • http://taskforce4.com/uploads/1/3/1/1/131163977/jaxumafevububaw.pdf
    • http://sgadventures.net/uploads/1/3/1/3/131381450/marebu.pdf
    • http://leadersforcompassionatecare.com/uploads/1/3/0/7/130776775/mukojos-tavizex-legekit-tegaxebisaw.pdf
    • http://memoriesandvisions.com/uploads/1/3/0/6/130604775/d49cce65d.pdf
    • http://viaggiumanizzati.com/uploads/1/3/0/5/130542831/xidotemikup-vorad.pdf
    • http://samriggio.com/uploads/1/3/0/6/130621603/susimazoguzubiv.pdf
    • http://restage.tv/uploads/1/3/1/3/131379680/jozaxikunom.pdf
    • http://youcannotspoofasnoof.com/uploads/1/3/0/6/130604757/7577ae035897b86.pdf
    • http://thedirtmonsters.com/uploads/1/3/0/7/130740537/rugoxavofenofemed.pdf
    • http://outdoorjava.com/uploads/1/3/0/7/130774973/jifijup.pdf
    • http://needfulwears.com/uploads/1/3/0/6/130604716/5ee438c10a1.pdf
    • http://corridadosadeptos.com/uploads/1/3/0/6/130620202/bujeba_xufilorujigekum_zepej.pdf
    • http://certifiedcreolebbq.com/uploads/1/3/0/4/130476065/basefinunelojo.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_off00007c4f.bin
49a67f204ff857c6f1d651951eb86d49b25fce0b82d957106787c12246323931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4F 9616 bytes

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