Malicious PDF — malware analysis report

Static analysis result for SHA-256 5939be0d704986a4…

MALICIOUS

PDF

69.8 KB Created: 2021-02-22 17:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c4ceb6cea9b7889b2f2823a95d830a8 SHA-1: d64d90332c183c4c2c4a4cff8ea26c3e00351e36 SHA-256: 5939be0d704986a4c607226a0173b289e2ef71c6e2e1ec16bd557459984ab4cb
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/aws?utm_term=dell+optiplex+7010+ram+upgrade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fca5f167289f.pdfIn PDF document text
    • https://tizidebiwefixim.weebly.com/uploads/1/3/0/7/130739379/6c6a9d45fc144ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_602ad05f8b83b.pdfIn PDF document text
    • https://nesotufofiwin.weebly.com/uploads/1/3/1/3/131381712/1911936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_601a72569c96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_601f8d38972f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_5fdc4b7187ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_6019c519ab844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_6025538ced8db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fcf5b1fc766d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_602e262215295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_600dfd740a70b.pdfIn PDF document text
    • http://kuvurewe.22web.org/libros_de_fisica_preuniversitaria_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_600f2c8e5ef78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5fdbd17e95203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5febf449b955a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418391/normal_6004e9d1586fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5fed468887318.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 5440 bytes
SHA-256: 7e9e26dbda63eb21ba4cb9619c5c085bb5e2a48ed4440526f8c13ee079c10ba1
font_01_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 11132 bytes
SHA-256: 70fd4847b1382560758bd0df28b6b2a90d40b0048db37c1e4a088d25cd0d9dfc

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