Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f74700bf8c8342…

MALICIOUS

PDF

75.7 KB Created: 2020-11-19 20:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b74e10a2bd99b9d36ed7b810842ca4a4 SHA-1: dcdd16f3ab9f5617bb5cb2f1c533a34660b35336 SHA-256: 95f74700bf8c83421f12b824bed4d6e4f6c807c0e54752dfd24589751175aa13
134 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. It uses an invoice-themed lure. 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 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/123?utm_term=satellite+city+hall+kapolei PDF link annotation
    • https://xoniwolujejusun.weebly.com/uploads/1/3/4/4/134456196/nikipugaxupejipitex.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/7496959.pdfIn PDF document text
    • https://zulafadosulivi.weebly.com/uploads/1/3/4/3/134305332/direpopogorimodibefi.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/kozisaj-pigepexerato-muzego-wojevalorol.pdfIn PDF document text
    • https://pajulabilo.weebly.com/uploads/1/3/4/6/134620642/vodazabe_pawarub.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/5788279.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/mefebufurok_woketuvofi_mepuzirofukig_loroguzosipakuw.pdfIn PDF document text
    • https://wegefaraza.weebly.com/uploads/1/3/4/7/134703567/woxurarelujowerak.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/1472503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_5f97cdbfbb976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d947c5c-5744-4682-82e7-18b9edc73b0d/jufipakib.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/calcio_totale_arrigo_sacchi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/amortization_of_goodwill_journal_entry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0a2b0f-6e04-45a3-a122-ddd9a616ca9b/ifruit_app_gta_5.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 5016 bytes
SHA-256: 45c1d277b045e41c3773b44554f1ce9c6d4b1488c2eaa47bd332de407207f444
font_01_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 11164 bytes
SHA-256: 76b35ae1f934ef85dcd4ff191420f52b1a4e80bbbc378177f0232bebef13096b