Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cb1f11900e7f93…

MALICIOUS

PDF

77.1 KB Created: 2021-02-27 22:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ad45abfa14e2fb4b28ccf85942edf0b1 SHA-1: c639cca24cdaa1cd7a56342f32de98d5cbf85d25 SHA-256: 68cb1f11900e7f930a893baa2faeb03b7920b6e3c86c371733033c8057e652a6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/wb?keyword=cultivo%20de%20arroz%20en%20el%20ecuador PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482018/normal_5ff4a0a16a526.pdfIn PDF document text
    • https://zejuraxarobepek.weebly.com/uploads/1/3/1/4/131407797/kimilabepotu.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/desogodijedozof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477163/normal_6035e40cd3019.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/dezuduvebelaned-nurilijiles.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/4541416.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/waverejox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426954/normal_5fe4041eecd10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462986/normal_5ff037908b912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371790/normal_6002d3299e896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460725/normal_5feb60797fe54.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/2620845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_60129263cac3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_602d7014844de.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/webipejonavuv/thucydides_melian_dialogue_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/51919567453.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/mozuvabowiwezimubas.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/xukasezorozagevugeneke.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_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 4772 bytes
SHA-256: 4ae2c29adaeecb3a59746cb3e3b0a403bd27f6c7f7dbadaceb26282d15dc5b80
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 12348 bytes
SHA-256: 6b7f5be21822624a7b20ebe74b5f0001c15084392a7bab89da17ffcc57206861

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