Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2ebef29737199c…

MALICIOUS

PDF

73.1 KB Created: 2020-06-04 15:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 74657be8a9e6332beb68929d1c5e039f SHA-1: 0f43ededf9369ba4b52ab5b8d21d4fc8227f7126 SHA-256: fd2ebef29737199cafbd542df61ffe24af41c7befe603d42c7f52d7b614c16a0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified as a PDF link farm. The primary purpose appears to be directing users to various external PDF documents hosted on different domains, likely for SEO manipulation or to distribute further malicious content. The embedded URLs, such as http://devs.stefanaarnio.com/uploads/1/3/1/6/131606874/131606874.html#%25D9%2585%25D8%25A7%25D8%25B0%25D8%25A7+%25D8%25AA%25D9%2581%25D8%25B9%25D9%2584+%25D8%25B9%25D9%2584%25D9%2583%25D8%25A9+%25D8%25B2%25D8%25A7%25D9%2586%25D8%25AA%25D8%25A7%25D9%2586+%25D9%2581%25D9%258A+%25D8%25A7%25D9%2584%25D8%25AE%25D8%25A8%25D8%25B2 and http://snapmediastudio.com/uploads/1/3/0/6/130621021/buxebafuxu_vonazi.pdf, are key indicators of this behavior.

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://devs.stefanaarnio.com/uploads/1/3/1/6/131606874/131606874.html#%25D9%2585%25D8%25A7%25D8%25B0%25D8%25A7+%25D8%25AA%25D9%2581%25D8%25B9%25D9%2584+%25D8%25B9%25D9%2584%25D9%2583%25D8%25A9+%25D8%25B2%25D8%25A7%25D9%2586%25D8%25AA%25D8%25A7%25D9%2586+%25D9%2581%25D9%258A+%25D8%25A7%25D9%2584%25D8%25AE%25D8%25A8%25D8%25B2 PDF link annotation
    • http://snapmediastudio.com/uploads/1/3/0/6/130621021/buxebafuxu_vonazi.pdfIn PDF document text
    • http://travelbygwen.voyagerwebsites.com/uploads/1/3/0/4/130476242/doburazel-kekesameg.pdfIn PDF document text
    • http://prairievisions.org/uploads/1/3/0/6/130604667/mifiwaji.pdfIn PDF document text
    • http://simptech.net/uploads/1/3/0/7/130739695/92f12e8.pdfIn PDF document text
    • http://livinghubs.com/uploads/1/3/0/2/130272973/1927002.pdfIn PDF document text
    • http://thebrowhaus.co.uk/uploads/1/3/0/5/130540083/3461657.pdfIn PDF document text
    • http://holisticbeautywellness.com/uploads/1/3/0/6/130621503/polajalasiniva_vidadelo_watef.pdfIn PDF document text
    • http://devs.stefanaarnio.com/uploads/1/3/1/6/131606874/terms.htmlIn PDF document text
    • http://devs.stefanaarnio.com/uploads/1/3/1/6/131606874/dmca.htmlIn PDF document text
    • http://devs.stefanaarnio.com/uploads/1/3/1/6/131606874/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fuwimupon.files.wordpress.com/2020/06/pezoguz.pdfIn PDF document text
    • https://vijugogazoxo.files.wordpress.com/2020/06/lazeretifilobikuf.pdfIn PDF document text
    • https://puwubovefije.files.wordpress.com/2020/06/sizixufudukilufa.pdfIn PDF document text
    • https://foxiwewuko651150165.files.wordpress.com/2020/06/16510139604.pdfIn PDF document text
    • https://vomazoxurus.files.wordpress.com/2020/06/sawoxeruranozoluduverus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000bad4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBAD4 32812 bytes
SHA-256: 04f50da6d38b8fd7711b3c7ee22f345fb2cf4f2592b7656c177516333436bce0
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 9848 bytes
SHA-256: b517bda2cf7e43a6cd813375d1f27b4874f04554e22304898395b241ff52bde2

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