Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38d1aa5530cb09d…

MALICIOUS

PDF

40.0 KB Created: 2020-04-03 01:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 5f4763a26f97d8eac9ec17dfd7d88f0b SHA-1: 910b82155220dad1cfce5768d7310701a6bec9a8 SHA-256: e38d1aa5530cb09dfdc4cfc31089b4856befd453975f823e3cc58be985d50c02
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to direct users to malicious content. The document body, though partially corrupted, suggests a lure related to 'Spring framework certification study guide'. No scripts were extracted from this sample, limiting the ability to determine further malicious actions. The primary attack pattern observed is the mass distribution of links to external domains.

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://fraggingaround.ca/uploads/1/3/1/1/131163516/131163516.html#spring+framework+certification+study+guide PDF link annotation
    • http://kipjonproductions.com/uploads/1/3/0/7/130775742/dugazura.pdfIn PDF document text
    • http://hazmatmagazine.com/uploads/1/3/0/9/130969048/kogim.pdfIn PDF document text
    • http://excelmediasvg.com/uploads/1/3/0/3/130379098/tomewetenogixefo.pdfIn PDF document text
    • http://palosislamiccenter.org/uploads/1/3/0/7/130775033/falekesafoledi_zixituzofisit_kewemupukoza.pdfIn PDF document text
    • http://innarc.com/uploads/1/3/0/6/130621730/1951855.pdfIn PDF document text
    • http://indianaguardian.org/uploads/1/3/0/8/130874224/tesiro_mavoralireg_naguvani.pdfIn PDF document text
    • http://zenit-museumsbau.de/uploads/1/3/0/5/130588232/wojipidonivizirifexo.pdfIn PDF document text
    • http://battlecreekbh.com/uploads/1/3/0/7/130775229/rafuwe.pdfIn PDF document text
    • http://thomasvasasphotography.shop/uploads/1/3/0/6/130604782/gonijalut.pdfIn PDF document text
    • http://cartersbasecamponline.com/uploads/1/3/1/4/131406600/6891553.pdfIn PDF document text
    • http://menta.website/uploads/1/3/0/9/130969249/9685654.pdfIn PDF document text
    • http://matthewscanon.com/uploads/1/3/0/9/130968976/332677d833de2dd.pdfIn PDF document text
    • http://namelesstea.com/uploads/1/3/0/3/130323148/nobagumipa.pdfIn PDF document text
    • http://stefaniefusi.com/uploads/1/3/0/9/130969114/bopufozusefabi.pdfIn PDF document text
    • http://jakeshandling.com/uploads/1/3/0/5/130551944/xakepasereso-texakuripexobep.pdfIn PDF document text
    • http://simpelpuurnatuur.com/uploads/1/3/1/4/131408024/dupif.pdfIn PDF document text
    • http://purplezeus.com/uploads/1/3/1/0/131070841/8865060.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 1

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_off000073a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A7 8032 bytes
SHA-256: 064a094fe527b5c772d17458850b1b588944e98d958fde25a7c9e0ed9bba9951

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