Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56361a589ca0526…

MALICIOUS

PDF

83.0 KB Created: 2021-03-26 07:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8ce74c95012d5123bbbc15f4e5be8416 SHA-1: 455f9a410dd7dd8a79d61bbfd907adc7dbf4362c SHA-256: e56361a589ca0526ab5fae0d05a7363d1b4f54e42b73499f0770472d30e17728
186 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 0.9997

Heuristics 6

  • 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.
  • 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://seumenha.ru/123?utm_term=the+wave+full+movie+english+2015 PDF link annotation
    • http://jigunemav.22web.org/excel_pivot_table_report_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/gfjabYa/gutschein_bei_amazon_prime_einlosen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408321/normal_6007d0935d4b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_602109a25ad69.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jgGjfif/mogivexufo.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/Sgfiejd/e_with_accent_spanish.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/fizudug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_60330b89862b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447095/normal_5ff804515ba1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_603ce0cfa2b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_6038ed11bc415.pdfIn PDF document text
    • https://gunanase.weebly.com/uploads/1/3/4/4/134488627/4c3f756ade9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe0ff1c61278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_604f6b970cbe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404299/normal_5ffaec43f240d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fc757e737beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_6042fec5c9eb1.pdfIn PDF document text
    • http://dafumod.22web.org/how_to_use_lowrance_elite_ti_7.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/9ugeC9v/firefox_browser_latest_version_free.pdfIn PDF document text
    • http://goranefadosire.iblogger.org/declaration_of_custodian_of_records_california_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiwig.epizy.com/sowufojibogarudigida.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_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 5636 bytes
SHA-256: fbc0d497f4f10c85fd7be95a09a498ce0ca560c1352ccf220f9dd3a90a21414e
font_01_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 11424 bytes
SHA-256: ad8522412d494509b49d871aa237f75c2d0cdd74f08ecb65f9eea644020ce84d