Malicious PDF — malware analysis report

Static analysis result for SHA-256 1879d0ae162afa0a…

MALICIOUS

PDF

71.4 KB Created: 2021-02-18 03:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2c66c63d70e1ae188fa0965f9e22cd0e SHA-1: 69e6be8435f34ea54b36147440d266fc40ad46ef SHA-256: 1879d0ae162afa0a43fe3307416603edc688b246410ea570d1b52ae46eb1629c
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://druttle.ru/wix?keyword=howard+miller+mantel+clock+winding+instructions PDF link annotation
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/zenekumuvanikuw_mijabapet.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/sufopubimawun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421776/normal_5fda1c634ede7.pdfIn PDF document text
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/3888216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_6029d8e2ee334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450730/normal_6007a41328b16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366331/normal_60052c54b0d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469349/normal_602553374f644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_6025afb7b3529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fe694f79260c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_6011b87121eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_60194c22bfc5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449402/normal_6002c1314618c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_600c940192e24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450734/normal_6006553c86c91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482880/normal_5ffdba9451347.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/wizidimawag/2001440178.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/29154947008.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_off0000cc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC62 5256 bytes
SHA-256: 6e0fdaaacdd6e69ff74dc81bce94c161736d5e5ed548c211f86d98a3c394368e
font_01_sfnt_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 10500 bytes
SHA-256: 2de4e40a906079da7e78f216467ba946fb7b7d6fd2f1ca810b8f98d1e14277c5
font_02_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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