Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27f3549df69df55…

MALICIOUS

PDF

90.8 KB Created: 2021-03-23 13:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 711e25a86b5ee9b692b198d07cc45ec0 SHA-1: c46adfaa68ed16431b31e22f2b07498276c1183c SHA-256: e27f3549df69df559da9bd67276ee43a56499268d4183d75d0b66ffd4b7d99ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://vilenefex.ru/strik?utm_term=how+many+dresden+files+books+are+there PDF link annotation
    • https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/3785800.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/horse_trek_guide_jobs_nz.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/6834630.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/kikibopila.pdfIn PDF document text
    • http://wotanute.22web.org/ks3_maths_rounding_decimals_worksheet.pdfIn PDF document text
    • http://volazasi.iblogger.org/en_el_nombre_de_la_rosa_pelicula_completa_subtitulada.pdfIn PDF document text
    • http://lunotikipadul.66ghz.com/act_practice_math_test_2_answers.pdfIn PDF document text
    • http://vatologox.iblogger.org/xosomewaje.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/metazopatekofiwuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafijoraw.rf.gd/84107289902.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/gatudawuxirurixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a112e74-82a5-47f0-a8b8-29954584d74b/mirro_pressure_cooker_gasket_0406.pdfIn PDF document text
    • http://luvomovasofigu.rf.gd/13618146410.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/ap_biology_2_biozone_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/how_do_i_connect_to_my_sony_bluetooth_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/dofitakulubanepupuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4b0ab8-20b2-42a5-926d-851477823fa2/96028121299.pdfIn PDF document text
    • http://nulesuli.epizy.com/can_you_play_poker_online_for_real_money.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/dna_replication_worksheet_biology_answers.pdfIn PDF document text
    • http://mewexudidis.epizy.com/88257411048.pdfIn PDF document text
    • http://bumufemukelogik.epizy.com/robertshaw_thermostat_rs6110_manual.pdfIn PDF document text
    • http://nutulizoneket.rf.gd/tabela_valores_de_multas_2019.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_off00012475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12475 5508 bytes
SHA-256: 1edd552bde9241a94211818ac37096cb7ad82083fb95331799de9d3fde0d30e3
font_01_sfnt_off00013713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13713 11364 bytes
SHA-256: 06f47449bff2664cb2891c5abfb641904de6b2d88f53bc1240a5b8615f63e5e8

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