Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b2b5c5f27122db…

MALICIOUS

PDF

94.2 KB Created: 2021-03-31 13:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 11fc9efc3f787e68a090963bde7c4692 SHA-1: 082e2fe3da6fed6da85512b9fbb495562f257c4a SHA-256: 64b2b5c5f27122db0b50a89656fd317a82dae92a0d0314cd2a62025178001f60
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The primary malicious URL identified is resalured.ru, which is likely part of a phishing campaign.

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://resalured.ru/strik?utm_term=how+to+fix+leaking+fisher+and+paykel+fridge PDF link annotation
    • http://aov.one/zubavivusosopoxif4hu08.pdfIn PDF document text
    • http://mattelipsticks.site/dizavukubinowuvesfescj.pdfIn PDF document text
    • https://fobizolavavoka.weebly.com/uploads/1/3/1/4/131406440/718309.pdfIn PDF document text
    • http://daating19.site/dell_xps_15_7590_spec_sheetcxx6x.pdfIn PDF document text
    • https://rigawolazi.weebly.com/uploads/1/3/4/7/134710531/fuzepekadinawodiw.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/4439659.pdfIn PDF document text
    • http://legrand-spb.ru/giancoli_physics_7th_edition_textbook2ipkx.pdfIn PDF document text
    • http://rewita.fun/what_is_default_ip_address_of_dlink_switch5nira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_43dc671393924583a4d9b2f40d9d4f2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/bible_questions_and_answers_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/holcim_philippines_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/39416904180.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/51867303757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9f6dde-bd59-4fd2-9950-d75deaee49f1/mafibone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fc00c3-f2bd-49af-b91b-e86f70cfd571/triangle_tube_prestige_solo_110_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/helios_airways_flight_522_accident_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c32b9d-1063-4e08-8d40-87ae1bfe1980/10698607737.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/97253342424.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_221ba77895b2476b9993dc394c30b809.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/seriposuj/le_petit_prince_chapter_15_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae6d428-358e-4eff-b788-b7278ec64e89/titalejefimuludisew.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_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 5588 bytes
SHA-256: 0ca2bccecf672d2bdbcab434613f71ab8484feb1d1ba098bfe5298ec7bcbd211
font_01_sfnt_off00014185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14185 12332 bytes
SHA-256: e314039da582a7c475ef2a8e2ae19cd21564eaca47cac777cec35bafeb89de69

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