Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cc91bc47a519c9…

MALICIOUS

PDF

74.4 KB Created: 2021-03-02 14:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2cd718ca3268f7e473e6b70017889b5c SHA-1: d8fc313e0a80167f21519ad1c9b948159d495a01 SHA-256: 26cc91bc47a519c94a1e9b40fc1b5a86527f3aa0831dcb8ed8dd4d30a3ebde93
126 Risk Score

Malware Insights

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

The file was detected as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV. It contains numerous embedded URLs, with a primary external URI pointing to 'https://xajibur.ru/wix?keyword=babe+ruth+1920s+video'. The PDF also functions as a link farm, suggesting an attempt to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/wix?keyword=babe+ruth+1920s+video PDF link annotation
    • http://ralugugifoxatir.scienceontheweb.net/zilagekotosemot.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/11856501038.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/34381578614.pdfIn PDF document text
    • http://xivusolokedujes.22web.org/9567960894.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/how_to_heat_my_coleman_hot_tub.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/micro_gramos_a_mili_gramos.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/vawoginele/jabenofirexakegifatu.pdfIn PDF document text
    • http://rogitini.epizy.com/bezuregizesuparupepozudaj.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/difejerokefusidoxafifid.pdfIn PDF document text
    • http://xipibevamelun.rf.gd/silence_of_the_lambs_3_trailer.pdfIn PDF document text
    • http://jutibigata.epizy.com/88574582992.pdfIn PDF document text
    • http://wififeju.atwebpages.com/vizio_sound_bar_setup_to_tv_hdmi.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/cushman_and_wakefield_office_market_reports.pdfIn PDF document text
    • http://jimatupobosubu.rf.gd/gogiwolit.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/bell_fibe_tv_remote_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/2014_jeep_grand_cherokee_service_manual.pdfIn PDF document text
    • http://senoburem.epizy.com/who_wrote_i_am_a_child_of_god.pdfIn PDF document text
    • http://womusosixedel.epizy.com/kerizifusatusulo.pdfIn PDF document text
    • http://katezoluvezile.epizy.com/25768641183.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/domofilofunum.pdfIn PDF document text
    • http://nujunawefati.epizy.com/android_one_vs_android_9._0.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_off0000e571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE571 5612 bytes
SHA-256: 56f1b5671697e50fa5d30f8315e096bafd2a6bb3dd75ea01d7db3582c9f5005d
font_01_sfnt_off0000f87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87F 10508 bytes
SHA-256: 7ee14d391bf0882a72f79d7578399f1ba8e6e0890544f329ca492a40c5304b2b

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