Malicious PDF — malware analysis report

Static analysis result for SHA-256 968e7ffbb64536f3…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 09:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a75a7974a738d74307ba54e96eb39a6 SHA-1: 51f54b87028705be303509d732652979d87fb7c6 SHA-256: 968e7ffbb64536f3e4b7917da6e0bcedb2ca4c86f26af93248ecb1cfaee3a592
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 0.9992

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://kuzutuzo.ru/strik?utm_term=what+is+the+oa+diet+plan PDF link annotation
    • http://tufepuwaw.iblogger.org/dexalakepege.pdfIn PDF document text
    • http://bettermoneytips.com/jelofcjzdz.pdfIn PDF document text
    • http://xbet1.fun/lethal_street_fighting_self_defense_systemeamun.pdfIn PDF document text
    • http://fresh-ita.fun/imperfect_tense_in_spanish_worksheet_answersbtida.pdfIn PDF document text
    • http://guwilos.iblogger.org/malayalam_bible_file_free.pdfIn PDF document text
    • http://rollernefritmassage.xyz/dakogafaviwubixukjbh5e.pdfIn PDF document text
    • http://katowad.22web.org/adding_positive_rational_numbers_worksheet.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/bootstrap_form_multiple_sections.pdfIn PDF document text
    • http://beremoter.online/8310266547692ric.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/homelite_weed_eater_fuel_line_sizeh9ana.pdfIn PDF document text
    • http://vejinow.22web.org/vijuladogosekoronivabapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_9ec1843b8013445186fa155fc34d119c.pdf?index=trueIn PDF document text
    • http://kawobos.rf.gd/78074332492.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/7833740128.pdfIn PDF document text
    • https://e3ba7771-1cf2-49b9-be81-d91832e8ed63.filesusr.com/ugd/bc9675_5a0abd9b76c64702a7719204d7382055.pdf?index=trueIn PDF document text
    • http://ninanupazazudad.rf.gd/rh_isoimmunisation_rcog_guidelines.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_d306019437394c1f9d60fd7bb60fb6a8.pdf?index=trueIn PDF document text
    • http://mefexatireriva.rf.gd/counting_syllables_in_words_worksheet.pdfIn PDF document text
    • http://nofoforom.epizy.com/12049423100.pdfIn PDF document text
    • http://volitiwil.epizy.com/30040901716.pdfIn PDF document text
    • http://zefupolegemawak.rf.gd/51990233669.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_f5db37f2e1c54be69f9769cc8cf81962.pdf?index=trueIn PDF document text
    • http://kalavelixafuro.epizy.com/98221536452.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_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 4964 bytes
SHA-256: cd176120943c82f0efea0a6df092b2ad08e36d2a6be32514c5ed28402f26a4a8
font_01_sfnt_off00010080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 10784 bytes
SHA-256: 577ebf25fb9c4e0f0ce7b25b78a1a5e38b64975eedae0ab0f5cb7dd3da3ce4ec