Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7905b5c3f0e20ae…

MALICIOUS

PDF

87.2 KB Created: 2021-03-24 12:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d725384e5c71501124ef3ddda1cf2cca SHA-1: 57d2ccdb78915640e5581177c5031ebe617553ec SHA-256: e7905b5c3f0e20aec5c1eb7b57c3abf51b13ae27daefe1f9c3b316637987cd10
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=cinnabon+cereal+target PDF link annotation
    • http://nuxipawuxodiwa.getenjoyment.net/appareil_urinaire_schma.pdfIn PDF document text
    • https://sonoredepi.weebly.com/uploads/1/3/0/9/130969061/gulobov_vetofudegawug_nodoxefol_durixa.pdfIn PDF document text
    • http://detonicro.website/ada_2015_guidelineso5236.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/kivesetafikonobide.pdfIn PDF document text
    • http://xsale.trade/reading_and_writing_3qjkw8.pdfIn PDF document text
    • https://cdn.sqhk.co/nodezaneripe/ijdjfLq/16215753248.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/converter_bibtex_para_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/0eyhbge/pekoja.pdfIn PDF document text
    • http://indonesia2health.online/93810811250r2ptc.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/f1e5a08a588.pdfIn PDF document text
    • http://timurberg.ru/pl_sql_for_loop_inside_selectckit7.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/509526.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/Siggjji/nugget_ampas_tahu.pdfIn PDF document text
    • http://rawiduti.medianewsonline.com/siemens_alstom_merger.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/wibedubosateg/mumipunugizusezijufezo.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/lasko_all_season_tower_fan__heater_in_one_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/29409861606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a67a3f-d109-4c95-8475-925cc80791f5/xisukiwibesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee69c41d-d2e7-4c9e-bba6-2095da6bc1ab/rewebosidewofogubokedipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b14c0d-122a-499f-8b3e-8c79cebd7b61/diferena_entre_metal_gear_solid_3_subsistence_snake_eater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0abda4a-60e9-4898-8dbd-eea47ef74e55/mini_dvi_to_usb_c_cable.pdfIn PDF document text
    • http://vawirir.atwebpages.com/how_to_reset_tp-link_av600.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/lasijetejoka.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_off000115b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B1 4832 bytes
SHA-256: 2212f6f80b4762b99d7aaf74fa7cb9c5af976fa501a85e7aa18d3508b9e38e9e
font_01_sfnt_off0001262a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262A 11976 bytes
SHA-256: d951e7f262291f5629b4c8b97a8f85488838f2aa97749f02d21b61a9e43aad2b

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