Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de7626cbc9d321b…

MALICIOUS

PDF

68.1 KB Created: 2021-02-06 09:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: de823a93f883e39e655a126b9fe09fc8 SHA-1: aec00269dce18c387393b4e2e43c80bdbcf2d3f7 SHA-256: 1de7626cbc9d321b247f26b6e7c921e3a6c8905446c42ceb35aa212413cea092
254 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
  • 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=approaches%20to%20social%20entrepreneurship%20pdf In PDF document text
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/dc6b3deb7f9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403954/normal_5ffa791759dc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421329/normal_5fddf8f138ca5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454803/normal_5fd073e05198e.pdfIn PDF document text
    • http://muluwusive.22web.org/30706633446.pdfIn PDF document text
    • http://rijupoxog.22web.org/ritijiretunerifixobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5ff2bf2140abb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_6000823a85d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479707/normal_601dd1ec6fad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_601973f4a228a.pdfIn PDF document text
    • http://wetepuzasuvuroz.22web.org/71907097918.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/kexamoxusinixu/rubber_asphalt_deformation.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/schedule_d_tax_worksheet_online.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/29924488375.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/cisco_umbrella_roaming_client.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_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 5232 bytes
SHA-256: 657778dfe5b51ac0f13a116fa04d5d19e1610d3b210176c45e9b865cf4447664
font_01_sfnt_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 10364 bytes
SHA-256: 57b6e935082b8802405a9cbdd816f60a00ebe3d962f80f18a1605089c6c37ca4

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