Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab159a7544b082b…

MALICIOUS

PDF

67.4 KB Created: 2021-03-07 09:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 77df7dce9c31115e67f5a1064e32535c SHA-1: 470462102c873a23ab4f30a7586ed09d1230b111 SHA-256: cab159a7544b082ba67981566323bf8b56a68f4db4fbbf77be4c173feea861f7
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=proakis+digital+communications+6th+edition In PDF document text
    • http://gelufose.scienceontheweb.net/orthopedic_physical_assessment_magee_6th_edition_free_download.pdfIn PDF document text
    • http://snatural.space/house_music_beat_maker_freenwlw3.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/bd15b8d843f254.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/momuvomejudane.pdfIn PDF document text
    • http://chemistryplus.space/prototype_testingjegtr.pdfIn PDF document text
    • http://centerbluebadge.com/wrong_turn_2_tamil_dubbed_freehcjsc.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/madirem.pdfIn PDF document text
    • https://tagudosalanuku.weebly.com/uploads/1/3/1/4/131452811/347711.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/xeropizuwe/38487073640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2b7fc9-1456-4041-97dc-7283b6a8dc84/boton.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/dan_abnett_warmaster.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/fisher_scientific_traceable_digital_thermometer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/portfolio_bubble_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/tizuluxipekixepinoruves.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/vadupefunafuludedexa.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/diablosport_intune_i1000_vehicle_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b24a564-d916-47b9-93b2-7bc44beab724/how_to_change_needle_position_on_kenmore_sewing_machine.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/beloxebakazag.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_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 5572 bytes
SHA-256: 36aeaf3a30db2586bd85eb9f6d401e3d037781e446dc31527c24a818e96951fa
font_01_sfnt_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 9720 bytes
SHA-256: 55afb81d2c3ffd95ea7eeebefafea987617c65862ad7a31acc9c5655c0ca1e67