Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e6efd64fe35c2d…

MALICIOUS

PDF

87.9 KB Created: 2021-02-05 22:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5ea621082eaba13a359aba814d58a0a3 SHA-1: d6df69e3c861cec5e34a8db139efb60982f0035c SHA-256: a1e6efd64fe35c2df15d8d67ca542e9949791f7d625a0b1ad232dd81a8d99490
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://maypoin.ru/wb?keyword=effective%20interest%20rate%20excel%20template PDF link annotation
    • http://revershjtb.site/litanetipll2qr.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/xizixunikagu-begotorabavupax-dalisibod-wiwuzeletuke.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/kowevudalo.pdfIn PDF document text
    • http://ek-arenda.ru/58115242368y68i6.pdfIn PDF document text
    • http://vienvozvrat.site/vacuna_bcg_proceso_de_cicatrizacionp9bhf.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/6b9910a0c28.pdfIn PDF document text
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/1652284.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/3435956.pdfIn PDF document text
    • http://shoop-ft.ru/bsc_2nd_year_chemistry_book_downu213a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/bigeninujusuwukubawakigu.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/california_dmv_forms.pdfIn PDF document text
    • http://votitagupen.epizy.com/jojonenevamuzezuxamugig.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/20601336995.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/6567389634.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/gikazevidatogevuj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBA 5248 bytes
SHA-256: f1c71554a836282780c192e6c0f0fdeea9c15b5d3f1a9e20380b1828965445fb
font_01_sfnt_off00012d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D94 10952 bytes
SHA-256: 0de545efc78fe93aca9bd240c12998fff4f9438ca50b266cf01d4beefd5ab3bd