Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba2f3786c5d76a2…

MALICIOUS

PDF

41.3 KB Created: 2020-03-16 00:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6eb23747294e44b7d94424bb9fee80eb SHA-1: 787b86d51d2a558de5395da47786d2f9271be8cf SHA-256: 0ba2f3786c5d76a237d9e83c36c7fad75e01462b7d05fd33818c4164e71698ad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to URLs that are also present in the extracted URL list. This suggests the primary purpose is to redirect users to a network of websites, potentially for SEO manipulation or to serve further malicious content.

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://burleypta.org/uploads/1/3/0/7/130739664/130739664.html#linux+mint+17.+3+installation+guide
    • http://www.msrobynhorn.com/uploads/1/3/0/4/130483537/kuwuvakuvob-zomigepuk.pdf
    • http://www.ggbirds.net/uploads/1/3/0/5/130540926/1b5821.pdf
    • http://denverlasiksurgerys.com/uploads/1/3/0/7/130775466/xusokonamu_vaxas.pdf
    • http://ppgmichigan.com/uploads/1/3/0/4/130492229/zodunuvetebedub_jorezarevu_mulomebep.pdf
    • http://piercingpoli.com/uploads/1/3/0/7/130775916/koweni-fosajabedixate.pdf
    • http://woodiesbodyshop.com/uploads/1/3/0/4/130477490/nesadonone.pdf
    • http://webmail.msbinghammath.com/uploads/1/3/0/2/130289648/135290.pdf
    • http://demolitiondownersgroveil.com/uploads/1/3/0/3/130323894/7804875.pdf
    • http://webdisk.prorevmanagement.com/uploads/1/3/0/7/130738896/6c06b7e3402f0.pdf
    • http://thechillingsworthmystery.com/uploads/1/3/0/3/130379135/kepezo.pdf
    • http://jessicaschutzma.com/uploads/1/3/0/4/130477131/b88e8.pdf
    • http://joiaspinelli.com/uploads/1/3/0/6/130620605/golejig-duzapitutu-xewixepobalasev-ritobavudulavu.pdf
    • http://orderyourbluebook.com/uploads/1/3/0/2/130289809/2706113.pdf
    • http://www.allsoulsanglican.com/uploads/1/3/0/2/130272242/zikudebalevubo-sipez.pdf
    • http://mta-sts.quakershaaglanden.org/uploads/1/3/1/0/131070186/3984682.pdf
    • http://www.mysvoffice.com/uploads/1/3/0/4/130491444/4917b85aeb5558.pdf
    • http://sylasliptick.com/uploads/1/3/0/5/130550993/sitezejivemawa.pdf
    • http://www.microfoundations.com/uploads/1/3/0/6/130604935/f7dd92d61219.pdf
    • http://mbrsmartbook.com/uploads/1/3/0/5/130588360/5c6730833a60c9.pdf
    • http://malamaphotobooth.com/uploads/1/3/0/6/130639052/wetimena.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_off0000791b.bin
5cfd5402b3796dc32726c4087ce6e49dbd1d17ec1e7d7c736667d4d6d3053fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791B 7876 bytes

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