Malicious PDF — malware analysis report

Static analysis result for SHA-256 e476fca5baba4490…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 19:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5850c251135a8c5240e9b8a3dfe76ecd SHA-1: e02029803ea2460dcb8007bc401c1911925feba8 SHA-256: e476fca5baba4490e3d8ac050be3dd3d0cac859b8cdc1e320f1864d486ff52a7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. The embedded URL `https://mezovuduw.ru/strik?utm_term=how+to+reset+oil+honda+odyssey` is presented as a lure, likely to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the nature of the detected threat suggest it's designed to exploit user trust for malicious ends.

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://mezovuduw.ru/strik?utm_term=how+to+reset+oil+honda+odyssey PDF link annotation
    • http://zajiledafalam.getenjoyment.net/assignment_problem_applications.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/tataverumofekupaxu.pdfIn PDF document text
    • http://jawunefuda.mygamesonline.org/65729350819.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/6236209.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/bicameral_conference_committee_report.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/kalozajivelosudunis.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/mivokozibu/fimoruzemanuzi.pdfIn PDF document text
    • http://zewupubo.rf.gd/information_of_sound_pollution_in_marathi_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525e61f1-d698-4c46-8271-7615a6067b4d/95817205940.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/essential_english_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd9d5e4-2ed2-4ec5-80ef-49c7920d1bc1/fubikulewitemaw.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/abbyy_transformer_plus_4._2._263.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/niwitogimekatinozusulu.pdfIn PDF document text
    • http://vazuvipib.rf.gd/what_is_the_value_of_a_2015_chevy_equinox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0534631a-6e9a-4c5c-923b-23cf7ba0ab28/mufomotanevedub.pdfIn PDF document text
    • http://digimoxesimukus.rf.gd/viwagemamaxot.pdfIn PDF document text
    • http://vemaxuvigufu.epizy.com/sufexetasu.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/zonatojurofu.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_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 4856 bytes
SHA-256: d7c301a5358a6d5efee317fd2f956ed29a4562aa7fe82161ea15742635d44b8e
font_01_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 10904 bytes
SHA-256: 3117713b8880ec10fa51a83edad2e59d2840aad1a89ec1837e48923257008c15
font_02_sfnt_off00011a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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