Malicious PDF — malware analysis report

Static analysis result for SHA-256 130d2bdf6451c603…

MALICIOUS

PDF

66.4 KB Created: 2021-02-13 17:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7130fb05792baabfb1554941f26e0d9f SHA-1: 191ce07e58542b2847359df60ac6d8d4edd13425 SHA-256: 130d2bdf6451c603ffaf89ab86cea904278c27a57311a20ac74685dab368edb4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=drawing+free+body+diagrams+answer+key In PDF document text
    • http://whitetwo.space/29293654469644z2.pdfIn PDF document text
    • http://salonvarna.com/564487183226zwxc.pdfIn PDF document text
    • http://nelitip.22web.org/14128497009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470977/normal_5feee22d90b00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461201/normal_5ff3d533d1cdf.pdfIn PDF document text
    • http://xozapab.22web.org/sebemaxowinasovitab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_6000b39d98a31.pdfIn PDF document text
    • http://dnepr24.info/geek_auto_parts.comlr4xb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fdb2de763382.pdfIn PDF document text
    • http://giocodigital.website/zujuzemj86my.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502493/normal_5ff2f7368d36e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5ff289b392ccf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxuwer.epizy.com/portfolio_indd_template_free.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_off0000c64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 5592 bytes
SHA-256: d41732b1441dfce7219b86dd4b2cd2d27d215e5e442cb672c6049100bc6e2597
font_01_sfnt_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 10172 bytes
SHA-256: 370c5d156b633b081fcbcc5401f5414cea64ce3c0f4ef3c01a474eec9629cc9e