Malicious PDF — malware analysis report

Static analysis result for SHA-256 601c449e14515130…

MALICIOUS

PDF

80.2 KB Created: 2021-03-06 20:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cb4ada7e5040fbb861350cf0059b8ae7 SHA-1: bf386db15db8e7bf93873f4d24ed49a84e1743a4 SHA-256: 601c449e145151304d2ad621a4b8ad7a59ec9b519ec8b8c53a657600debe973c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wb?keyword=maths%20basic%20formulas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463788/normal_6036657e3bd21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407729/normal_60003ca4e9144.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/gjieF3t/gisimewoxinejase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_6036cb474b726.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/your_zone_twin_over_full_bunk_bed_assembly_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/ilMSN2F/gabenupunukekififaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_11aa577a5c1d4b828594abfe037e6f70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/michelle_bachelet_venezuela_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/gtx_970_g1_gaming_bios_update.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_ffd5ab88910342598b085d476a696011.pdf?index=trueIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/how_to_use_kenmore_warming_drawer.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/58710410144.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/pirim.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/resezojibilaloselorepega.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/motokigiweku.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/bringer_of_war_sheet_music_trumpet.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_31a4157cbd4c45efaeb0d3a0d5c3796c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goneduzum/adobe_premiere_6._5_for_windows_10.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_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 5264 bytes
SHA-256: 0def49b1fbf7299eeb338e256648e10549d7ffb60187906f34c4e0be95ee7a2c
font_01_sfnt_off00010b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 11688 bytes
SHA-256: cd22b7c69ea0b8f296786b297b00d3488dae8a938816d6215daef3ac175d0841

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