Malicious PDF — malware analysis report

Static analysis result for SHA-256 33213a8fa6de8ef8…

MALICIOUS

PDF

76.5 KB Created: 2021-03-26 01:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09a57ba8e7cd18b8bfc9e538dab1d0d9 SHA-1: d73b45ca394651684167b65c45781e9a5b2bcb87 SHA-256: 33213a8fa6de8ef82a57b5f8654861628b7a4f4ee1a8e5818ce4a66ce126be59
156 Risk Score

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 0.9998

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://druttle.ru/wix?keyword=gta+san+andreas+android+mod+apk+cleo PDF link annotation
    • http://instas.site/walillahil_asmaul_husna_artinya_brainly3x59s.pdfIn PDF document text
    • https://mokaredoraxo.weebly.com/uploads/1/3/4/0/134095924/bixedixofuxew.pdfIn PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/47bbf8408.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/jipomesazopud.pdfIn PDF document text
    • http://vazagitomis.mypressonline.com/america_history_of_our_nation_teacher_edition.pdfIn PDF document text
    • http://jushq.pro/cisco_packet_tracer_netacadsbe0v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekisofekibote.myartsonline.com/wojidiv.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/labipugogake.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/adolescent_age_range.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/25495189222.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/how_to_write_a_script_for_shifting_realities_mha.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/will_evening_primrose_oil_induce_labor.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/patazatugujo.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/interview_with_the_vampire_book_vs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/storyboard_template_indesign.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/7_minute_briefing_word_template.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 5312 bytes
SHA-256: 515c3fe29ae7f51cff943411f2f5b8da0e9269b5b802c491418dbbcdb74ebf2e
font_01_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 10660 bytes
SHA-256: ee046bffbaf0a1779cf91eb2d34c6ad74c19cf641ad2134d3530537c8daac7bf

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