Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a84b55408fc9f…

MALICIOUS

PDF

69.7 KB Created: 2020-11-23 14:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bbf7fb8125ec78962951b895db797dd6 SHA-1: 956c090b97d53ef98f7abc2bf89676496cbced51 SHA-256: d26a84b55408fc9f5c22a525b277634d21c2dd20208bfce9b8820be7742d3436
136 Risk Score

Malware Insights

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

The PDF file contains a lure related to a "Dewalt cordless drill instruction manual" and employs a redirector URL, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=dewalt+cordless+drill+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5f91f0348dcca.pdfIn PDF document text
    • https://sadodirovi.weebly.com/uploads/1/3/4/8/134888529/4961458.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/luxemuluruxa.pdfIn PDF document text
    • https://jedapozopimu.weebly.com/uploads/1/3/4/6/134614290/5df678b294.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/682e3578a9ed70.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/rijopokegoxise-jemofibew-bapivataxison.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/d5a2a3b4.pdfIn PDF document text
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/kolobi-durepewixitejo-lolezedaxup-sibavobad.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/nunakixuma/it_security_risk_assessment_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/lijegixijomewemages.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/allahabad_news_paper_in.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/stages_of_clay_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/monofotobixumodozaziju.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/xillian_stammering_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/sanawidi.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_off0000d334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD334 5176 bytes
SHA-256: cb94aef1c0cb719034847fea3a48621b04dde3b58c7fb9c913d22597d89ebca5
font_01_sfnt_off0000e4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 10804 bytes
SHA-256: 027066e02cbd81b2f29284e1f8aaa3e71dceb1752f5c985388fbc0b4481bedf8