Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36b30ea00f2e260…

MALICIOUS

PDF

70.8 KB Created: 2021-02-23 00:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: df827f64216d11c518352dc301b5161e SHA-1: bc9841b8ca99e1d1fe45183a2230f98ca9977655 SHA-256: c36b30ea00f2e260466852b63bafe1e28e9673a7a37c9114af43ad5ac11c6f96
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=chevy+cavalier+manual+transmission+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421350/normal_601a647b94063.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/dd0ea9dfb.pdfIn PDF document text
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/gowurej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_601ef1192b791.pdfIn PDF document text
    • https://lebugaboforov.weebly.com/uploads/1/3/5/9/135976333/xevara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6010e3abb6520.pdfIn PDF document text
    • https://sumijiluwovoj.weebly.com/uploads/1/3/4/2/134266387/mosoramowe-rebavalekape-zovaj-bemoxivigupited.pdfIn PDF document text
    • https://ranekiwoj.weebly.com/uploads/1/3/0/8/130814960/3228855.pdfIn PDF document text
    • https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/8928010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pibabopuduj/75176841616.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/38486269684.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/wotunuporalodagi.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/54401863691.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF3 5188 bytes
SHA-256: a1043d49a28224156586024959e212a934af6b7df6e3d2c523d015c1249fee99
font_01_sfnt_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 10456 bytes
SHA-256: 9661dc19f3fd6a7c1921f3aff222f753a53cf8e81d1e990be87c0473ae31eb29
font_02_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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