Malicious PDF — malware analysis report

Static analysis result for SHA-256 09235107ba852a54…

MALICIOUS

PDF

79.5 KB Created: 2021-03-11 00:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e0b6536a8718387a6d47884b7f01910 SHA-1: b4ea4d7812213b1ef87f942148b7ab6d8e592992 SHA-256: 09235107ba852a54063d4b76a5ae9503ae51d70c2dcde2e45402bba919610d1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://xezojetit.ru/award?keyword=calendar+november+2020+pdf PDF link annotation
    • http://foripekomufotir.mypressonline.com/2013_dodge_charger_sxt_awd_0-60.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/voxibawirov.pdfIn PDF document text
    • http://xevazabavivan.22web.org/75069940854.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/mipeboxuxolina.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/how_to_eat_move_and_be_healthy_download.pdfIn PDF document text
    • http://papewakoj.22web.org/free_full_credit_report_south_africa.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/13062080413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazisuj.epizy.com/bloodstained_steam_guides.pdfIn PDF document text
    • http://rewigikokisiw.epizy.com/46148689697.pdfIn PDF document text
    • http://boganarupimuga.epizy.com/zavotanedisitozuxarowi.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/famazozoxadu.pdfIn PDF document text
    • http://xojorefalez.rf.gd/nemadiz.pdfIn PDF document text
    • http://malebowepapin.epizy.com/xafazejafipejebureb.pdfIn PDF document text
    • http://nopexuwub.rf.gd/what_is_tcp_ip_protocol_architecture.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/adjectif_qualificatif_exercice_corrig.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/36696401303.pdfIn PDF document text
    • http://teveniwavabubak.rf.gd/totegigofol.pdfIn PDF document text
    • http://ditajizuru.rf.gd/appcoda_generation_ios.pdfIn PDF document text
    • http://kufosejuwures.rf.gd/61269322235.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/7645849092.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/1358190602.pdfIn PDF document text
    • http://jibisisejuw.rf.gd/concierto_de_aranjuez_music_minus_one.pdfIn PDF document text
    • http://minivenema.atwebpages.com/10630222304.pdfIn PDF document text
    • http://pojovalomoj.epizy.com/diablo_3_darkening_of_tristram_2019_guide.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/82367898108.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_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 5388 bytes
SHA-256: 304928b3b05f01c7b368e7e3eaadead4aedc0ebaca23eb14d11ad316ee630ac0
font_01_sfnt_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 10632 bytes
SHA-256: 6f9bbdc08fe030d440695512a292dbb156210c1694ddff68d485d49b0c68f434