Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c6f939e0b0bb44…

MALICIOUS

PDF

36.0 KB Created: 2020-06-15 07:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 50615b85e990ae501fb963374564af39 SHA-1: 398b95b9bbe2a3657660fda3026671daa60dbccc SHA-256: f6c6f939e0b0bb44dd5ca54008b920889da6fc65b6dcefd4a04eadd9265543e3
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Toronto exercise classes' and the wkhtmltopdf application, suggesting a lure. The primary intent appears to be directing users to a large farm of external websites, likely for SEO manipulation or to serve as a landing page for further malicious activity.

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://rivage.services/uploads/1/3/1/4/131406433/131406433.html#toronto+exercise+classes PDF link annotation
    • http://jinboshizhucedexianjin.br3h.com/uploads/1/3/0/4/130435937/jazegupejil.pdfIn PDF document text
    • http://hostmaster.peterkayfans.co.uk/uploads/1/3/1/6/131606624/357afbe81.pdfIn PDF document text
    • http://buyorrent.org/uploads/1/3/1/4/131453049/depemoge-jedufesuni-patuboxa.pdfIn PDF document text
    • http://swingfromthesky.org/uploads/1/3/0/5/130588290/beb82.pdfIn PDF document text
    • http://health-and-wellbeing-week.co.uk/uploads/1/3/0/6/130603814/zodunowaterosuximuwa.pdfIn PDF document text
    • http://thephoenixeventcenter.com/uploads/1/3/0/6/130621926/nukupatiziz.pdfIn PDF document text
    • http://squeakyqueens.net/uploads/1/3/0/7/130740363/texanemibugom.pdfIn PDF document text
    • http://lavenderbelle.co.nz/uploads/1/3/1/8/131857431/dutix-nebulivelunu-bamejanaju-vakomajeboza.pdfIn PDF document text
    • http://sydney.awrc.org.au/uploads/1/3/0/6/130604355/7b593c1.pdfIn PDF document text
    • http://teatroabbigliamento.it/uploads/1/3/0/5/130545557/2805230.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tupazipino.files.wordpress.com/2020/06/goxogotebifujojinese.pdfIn PDF document text
    • https://puwawefu.files.wordpress.com/2020/06/82129423785.pdfIn PDF document text
    • https://novebagi.files.wordpress.com/2020/06/zefatanigokafamutunu.pdfIn PDF document text
    • https://wubolijog.files.wordpress.com/2020/06/bapomas.pdfIn PDF document text
    • https://sufajase.files.wordpress.com/2020/06/90537320502.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 8

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_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 10812 bytes
SHA-256: a14320427d44a01a1d6f0fd22632d17c93371a66bfc196fa11194c01074b3ad9

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