Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c2e162cfebe023…

MALICIOUS

PDF

36.6 KB Created: 2020-06-08 07:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 837be5407a7de4410f65830799683d23 SHA-1: ea29d6f7f085cdd0f5a6d61e3a0c5e20543e93c4 SHA-256: 38c2e162cfebe023ddb976686899239fd843278dd573796a37cceefc007d2313
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a network of websites, likely for malicious purposes such as hosting further malware or phishing content. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://whisperwerkes.com/uploads/1/3/0/4/130488847/130488847.html#pes+2013+s%25C4%25B1k%25C4%25B1%25C5%259Ft%25C4%25B1r%25C4%25B1lm%25C4%25B1%25C5%259F+indir PDF link annotation
    • http://thrivingwithgrace.com/uploads/1/3/0/6/130640053/6702971.pdfIn PDF document text
    • http://hostmaster.barryley.com/uploads/1/3/0/2/130270833/lafulos.pdfIn PDF document text
    • http://webuysinglefamilyhomes.com/uploads/1/3/0/5/130551671/0168b45f3da.pdfIn PDF document text
    • http://bustite.com/uploads/1/3/1/3/131379035/5005201.pdfIn PDF document text
    • http://chaseryoung.com/uploads/1/3/0/9/130969433/b7f45dc67760e.pdfIn PDF document text
    • http://whiskeykissed.com/uploads/1/3/0/5/130551558/papuxitagejul.pdfIn PDF document text
    • http://vegantogosxm.com/uploads/1/3/0/4/130489128/ec6a22b36c852.pdfIn PDF document text
    • http://thefrontpaige.com/uploads/1/3/0/7/130740013/fomixibe-kufewokunugo-vobolibunopa-viranozenuve.pdfIn PDF document text
    • http://mta-sts.multipleincomealliance.com/uploads/1/3/1/4/131436967/6297075.pdfIn PDF document text
    • http://squeakyqueens.net/uploads/1/3/0/7/130740363/texanemibugom.pdfIn PDF document text
    • http://minefabaustralia.com/uploads/1/3/0/6/130620363/jakigivomaw.pdfIn PDF document text
    • http://hannahsmith.studio/uploads/1/3/1/3/131379518/8881160.pdfIn PDF document text
    • http://yishengbotikuanshoufei.br3h.com/uploads/1/3/0/9/130969837/tavaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zadidepetox.files.wordpress.com/2020/06/meretetagijeruribomijut.pdfIn PDF document text
    • https://xilegit.files.wordpress.com/2020/06/28072830195.pdfIn PDF document text
    • https://gozulakaval.files.wordpress.com/2020/06/lekarepuba.pdfIn PDF document text
    • https://miserowage857454741.files.wordpress.com/2020/06/11151165342.pdfIn PDF document text
    • https://telomema.files.wordpress.com/2020/06/34662897503.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://scripts.sil.org/OFLIn 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_off00005a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5A 14168 bytes
SHA-256: ca80a3dac6cabb9a7af6367ff6b0839b306a4f17e23276702dfc2bede0ddc43d

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