Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55f9e89ce4aa025…

MALICIOUS

PDF

63.4 KB Created: 2021-02-18 21:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dab371dc92d5163dd65fb916009eb4cc SHA-1: e79d6066b957881e0e97a22de2eebe5c8f096994 SHA-256: d55f9e89ce4aa02568cc7883c4c2d94af6c9591cec70b9d82f2054051550a6dd
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=samsung+m2825dw+toner+refill PDF link annotation
    • http://afracheat2.xyz/jenufemeloredofepadi9f49i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5fcb2080c2d59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_5fd9909054416.pdfIn PDF document text
    • http://lady-bug.club/2005_acura_tl_manualkepo9.pdfIn PDF document text
    • http://compte-cmbretagne.best/wuxiviserigesuwafudosn65zu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_6023502440c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_5ff81d86b61f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5fd3bf16728a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369776/normal_5ffd98f7da97d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_60039e904c68e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_601de317a27bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6029e7af29ba0.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/mexijegedakol/45362026195.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/32132378902.pdfIn PDF document text
    • http://zexubadisaki.rf.gd/billboard_2009_top_100.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/58043058805.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/chrome_network_tab_response_format_json.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_off0000b97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97B 5872 bytes
SHA-256: 3163c98c15ebc003ee69e75d9630c754631a4a6f4d51a60cf4552703b0615afe
font_01_sfnt_off0000cd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD76 10452 bytes
SHA-256: 8b700968d71a97273c6dcb53bf52ea83d0fd1320debe5a89cfe35bb9720af9b4

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