Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91df0c5b3468051…

MALICIOUS

PDF

79.5 KB Created: 2021-03-15 20:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71d8354a0e31e4a13265c14a16495807 SHA-1: aea2f94549d84d0d123090b732a44992f7a5f857 SHA-256: e91df0c5b34680510ef292bd538e9330e227160a4a15e8ba472ae2b9c22aae29
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, likely intended for SEO manipulation or to redirect users to malicious content. The presence of a URL referencing 'spider man ps4 game play free online' suggests a lure to attract user clicks. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=spider+man+ps4+game+play+free+online PDF link annotation
    • http://timecodes.net/finding_gradient_worksheet_tesoqife.pdfIn PDF document text
    • https://nunamifeko.weebly.com/uploads/1/3/2/7/132740424/4900542.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/7470021.pdfIn PDF document text
    • https://ludatigesoz.weebly.com/uploads/1/3/6/0/136050408/5915e7790.pdfIn PDF document text
    • http://tersq.fun/bel_ami_by_guy_de_maupassantvd9dn.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/bbaee30c.pdfIn PDF document text
    • https://xawaviwuxuj.weebly.com/uploads/1/3/4/2/134235980/efdc780d50e6.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/ways_of_the_world_second_editionhsori.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/linetajimetuveruvagol4hc3y.pdfIn PDF document text
    • http://duxuliba.22web.org/lugagafoxamevibowizuxij.pdfIn PDF document text
    • http://keepmaxi.space/manual_cetesb_de_gerenciamento_de_reas_contaminadaspzu4w.pdfIn PDF document text
    • http://quinzsy-studio.design/judewuxalamisijevslkic.pdfIn PDF document text
    • http://ylyn.ru/elite_dangerous_combat_tipsb6pq8.pdfIn PDF document text
    • http://onlineeshop24.xyz/basketball_world_championship_2019_wiki6vlcq.pdfIn PDF document text
    • http://ogranifruit.space/66734139274tfljo.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/kujapomib/suvedalabotagiwumodifa.pdfIn PDF document text
    • http://bavajusap.rf.gd/52582911153.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/janomibasojowomidexumop.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/cancin_de_hielo_y_fuego_1_comprar.pdfIn PDF document text
    • http://duwebajujasowum.epizy.com/89346093184.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/acorn_superglide_120_fault_codes.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_off0000f641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 5652 bytes
SHA-256: a1b656fdd1312cea6bdc26ec999213254d3f701deca4d11d3f927ae5a7dbb389
font_01_sfnt_off00010976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 11632 bytes
SHA-256: 946f8e7ddb3c61a9464c68183f7bb0f60836351da13085060d0d3f798b477613

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