Malicious PDF — malware analysis report

Static analysis result for SHA-256 089d487db470d715…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 21:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2b322a8384626d1a8855619c36ad5d80 SHA-1: 66a20928a72ce9bfc0bd8d8d573c336545723679 SHA-256: 089d487db470d71563912370568beab7b7061110d307842267c61ba9b07235f5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded URI point towards a phishing attack designed to trick users into visiting a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/wb?keyword=new%20year%202020%20live%20wallpaper PDF link annotation
    • https://cdn.sqhk.co/forokuxodel/RVhX5GM/mahjong_solitaire_classic_free_download.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/rozuvuguzev.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/gdiaRjb/lg_smart_diagnosis_app_for_refrigerator.pdfIn PDF document text
    • https://mazidumusud.weebly.com/uploads/1/3/4/6/134680178/2007254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_5fadbee7af485.pdfIn PDF document text
    • https://cdn.sqhk.co/bogebumemilo/gjijagg/17628781794.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/2hfhfq8/31155278301.pdfIn PDF document text
    • https://jagozuru.weebly.com/uploads/1/3/4/3/134360529/suzuf.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://uploads.strikinglycdn.com/files/87e67066-42a9-43a7-8b18-204299a819e3/buduweziteloxosikover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe27b02-dfc0-4c31-a033-0d667ce194f8/95248502486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2359e30-a0f4-4ee5-aedf-cc2b37838846/16361597238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bbf6a5-7ba5-4741-8b45-cc8b99bcb99c/climate_change_arab_spring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d52833-e8aa-49d4-bd61-3ba25676951a/91921196408.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_off0000ce91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE91 4624 bytes
SHA-256: b53d21bc338f2a9277c528e66f3155a8c897bcdca97876baad3d99e79f8c05b3
font_01_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 10176 bytes
SHA-256: ef5fe4ca77f871baca4ef656ce6d7ecbb255a5febd7fd179821db755d71ef2dc
font_02_sfnt_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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