Malicious PDF — malware analysis report

Static analysis result for SHA-256 06942cc0e87c1870…

MALICIOUS

PDF

42.2 KB Created: 2020-05-16 17:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66672b8dc30837e4b2d0f8ce3ea13843 SHA-1: de7b1a559b707249eec9688884848dc9a3ea84dc SHA-256: 06942cc0e87c187073af55d58f561e0cd181ac0f33641b908eeeda0a433c220e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict, and the presence of numerous external links suggests an attempt to manipulate search engine results or to host a large collection of potentially harmful documents. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://timeframingconsulting.com/uploads/1/3/0/6/130603772/130603772.html#first+grade+math+questions+and+answers
    • http://pinkgorillaejuice.com/uploads/1/3/0/5/130538981/6db3ff4c5fd0.pdf
    • http://hallcommunitydevelopment.com/uploads/1/3/0/4/130488165/pitafiwodujow-bugub-sijusefave.pdf
    • http://cjministry.org/uploads/1/3/1/3/131379496/761247386.pdf
    • http://tneducatorsconnect.org/uploads/1/3/0/5/130539097/2577732.pdf
    • http://calvarybaptistchilli.org/uploads/1/3/0/4/130488512/jujigefusejitujeme.pdf
    • http://elseorganizing.com/uploads/1/3/0/7/130738963/dafegovoxixiwajokoz.pdf
    • http://kylejohnsonmedia.com/uploads/1/3/1/4/131408248/c1d2d98.pdf
    • http://villamangomoon.com/uploads/1/3/0/2/130289460/wijozivivizuso-sokinikowebo-lisogim-zijumipe.pdf
    • http://jonnieshoney-dolist.com/uploads/1/3/0/7/130739696/lukug.pdf
    • http://sharonshakung.com/uploads/1/3/0/7/130776858/6beb59f9.pdf
    • http://ericbalkman.com/uploads/1/3/0/4/130476896/fixivepisu_tizobegik.pdf
    • http://theweddingaddress.com/uploads/1/3/0/3/130313247/8773392.pdf
    • http://visitmckingsisland.xyz/uploads/1/3/1/3/131384708/kegobora.pdf
    • http://robinosos.com/uploads/1/3/0/5/130540063/8903766.pdf
    • http://jonahlusk.com/uploads/1/3/0/5/130588701/janonapotisaz-podiririnegazes-zuperolivasixa-rasopezowutuk.pdf
    • http://thephoenixeventcenter.com/uploads/1/3/1/3/131380689/9450577.pdf
    • http://charmderminstitute.com/uploads/1/3/0/2/130289535/5229584.pdf
    • http://hope-post.com/uploads/1/3/0/3/130379959/kezuloledir-rusajomode-movara-bufatinamut.pdf
    • http://kristinadoubet.org/uploads/1/3/1/3/131379015/poxiniwaf.pdf
    • http://aerotechgolfshaftsjapan.com/uploads/1/3/0/9/130969791/4224105.pdf
    • http://carolinesandiford.com/uploads/1/3/0/6/130621294/9c3e18ace88.pdf
    • http://millennialdetailing.com/uploads/1/3/1/3/131384380/520627010c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007851.bin
86eada711cb335540a5dc9e662679c2acacb0f9d54c9d0cf4caf44b81257cf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7851 10712 bytes

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