Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed21cb8c945e1e7…

MALICIOUS

PDF

77.6 KB Created: 2021-03-10 02:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 09c1957cdde7c4ffb5a97d5a6bcf0205 SHA-1: 0935affcc137901c9d5107d74e6df622b4dfbb83 SHA-256: 2ed21cb8c945e1e7667820afef8deea31ba5a5925b97dd9416481eca35d2d747
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://jumiwimov.ru/wix?keyword=mcmush+virtual+lab+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4500911/normal_6006bd2a2d87d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5fe50612537d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_602b83956fc08.pdfIn PDF document text
    • http://questotzvezd.space/32050925473t83mk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_603dc50264792.pdfIn PDF document text
    • https://bujevajixa.weebly.com/uploads/1/3/1/6/131637668/7529702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_600db2a61572d.pdfIn PDF document text
    • https://wujipomazoki.weebly.com/uploads/1/3/1/3/131384492/d9acadd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5fd703c34f5eb.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/1982515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef94a05-6b7f-467a-b042-a7b48b875370/25414162522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b785f2a-f393-41d5-ac04-d728f188ad44/the_tempest_prospero_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1290676-01dc-4267-a1c5-78e7d96f901d/jozefuzedidif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7302f8-22bb-452c-b891-942e1a15c947/how_to_fix_vitamix_container.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbbdc98-1d0c-4e05-b26e-2213616e772b/2021366450.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_off0000f39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 5504 bytes
SHA-256: e59bd93e17090d1baf3b3beb0d442ca442e9f3d634674b2f2bbd9138f65bede2
font_01_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 10472 bytes
SHA-256: 67d1153322410317596505546278857de67814dd0f8144947f3c85344df0b1ce

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