Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab5d757b893e3c2…

MALICIOUS

PDF

45.1 KB Created: 2020-03-11 04:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 5787ec484361cc606b1076ee08e8de00 SHA-1: 080298c3288976a67d0d323216670285af6dfb6c SHA-256: eab5d757b893e3c263a3a1af2aef60d5a3f4402ee21fd831369fc416e670e173
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to similarly structured URLs on various domains. The document body, though partially corrupted, contains references to 'Setting critical path in ms project 2010' and 'wkhtmltopdf', suggesting a lure to trick users into visiting these sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, likely for SEO poisoning or to distribute malware. The presence of numerous unknown-reputation URLs strongly suggests a malicious distribution campaign.

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://zdzz.brdge.org/uploads/1/3/0/6/130620635/130620635.html#setting+critical+path+in+ms+project+2010 PDF link annotation
    • http://bardfamilymarketgarden.com/uploads/1/3/0/5/130551630/eee8a0e5702c.pdfIn PDF document text
    • http://hostmaster.qualitystitch.co.uk/uploads/1/3/0/3/130313612/vimiketogad.pdfIn PDF document text
    • http://74-123-77-221.mgwnet.com/uploads/1/3/0/6/130604931/6e039d0.pdfIn PDF document text
    • http://74-123-73-5.mgwnet.com/uploads/1/3/0/6/130620575/7450526.pdfIn PDF document text
    • http://mylunarsign.com/uploads/1/3/0/7/130739127/5568413.pdfIn PDF document text
    • http://www.h2oshotblast.co.uk/uploads/1/3/0/8/130813869/b65490943.pdfIn PDF document text
    • http://stylishpartyware.com/uploads/1/3/0/6/130621135/nemij.pdfIn PDF document text
    • http://mta-sts.hansonhoneybee.com/uploads/1/3/0/7/130775172/a79bd8cf.pdfIn PDF document text
    • http://extradecenter.com/uploads/1/3/0/5/130543488/510593b94b.pdfIn PDF document text
    • http://nathaniel-gaynor.com/uploads/1/3/0/5/130590461/b4d04973.pdfIn PDF document text
    • http://eumid.com/uploads/1/3/0/4/130483477/lelivuseni.pdfIn PDF document text
    • http://jsanchez17.com/uploads/1/3/0/2/130272452/jifefixam.pdfIn PDF document text
    • http://zofe.fr/uploads/1/3/0/6/130604543/c06910657b61.pdfIn PDF document text
    • http://bicyclexplorers.com/uploads/1/3/0/5/130551623/a6db0e67a.pdfIn PDF document text
    • http://hostmaster.irissrl.org/uploads/1/3/0/2/130271205/9646671.pdfIn PDF document text
    • http://munchkin-monitor.com/uploads/1/3/0/6/130620865/8460b2e.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 7248 bytes
SHA-256: 6bfccb4963e453ba414f8fc1962676004dc326e0e0bdc946870f1d1ed000df49

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