Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7349f932800076…

MALICIOUS

PDF

75.4 KB Created: 2021-02-22 00:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 53e4cb766e15b87a741cd37dcfd59984 SHA-1: f7d5aaf431581e9a76a3c79e87f64d262f1a313b SHA-256: 0e7349f93280007671287e538a58c5bf958fb2eb591bae5d3bdb63a0772530ad
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' pointing to suspicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by luring users to external sites. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content.

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://baarspo.ru/wb?keyword=ninja%20professional%201500%20watt%20blender%20manual PDF link annotation
    • http://lirituniwati.22web.org/how_to_write_my_name_in_hieroglyphics.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/nO9jdif/download_tank_battle_royale_mod_apk.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/kafulafumalofe-powez.pdfIn PDF document text
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/6876467.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/cojf2DJ/carriage_house_inn.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/6115415.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/igaghge/10467924222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubexemetaxoru.epizy.com/the_casino_job_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/butoji.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/free_amritvani_ram_sharnam.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/37414510573.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/chocobo_racing_iso_for_android.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_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 5784 bytes
SHA-256: a060b44aa009f9ceaee07500b5c47b923bf630ebc3d2701f85c91d9f28e45341
font_01_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 11424 bytes
SHA-256: 366cccf26c545dec741a82c3421c5b2a639f9803710b965ff9c8504691e9e1f3

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