Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27f19ff5f95e17e…

MALICIOUS

PDF

73.8 KB Created: 2021-05-03 01:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 85faac87367571f98f09ebf97eb9d141 SHA-1: 1f5a2a09c650bdc60c4d6e28e575b9e2a5de17a6 SHA-256: b27f19ff5f95e17ef04e4e8585bc8ffb848ca0f5c2605bc84cd0b0ff295bcd22
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing operation. One prominent link points to 'resalured.ru', which is likely malicious. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further indicating malicious intent. The document body, though heavily obfuscated, appears to reference product information, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=philips+norelco+series+9000+beard+trimmer+9100 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454161/normal_600350f97af90.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/vigowigewok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_6036f53ec1556.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/dagewiram-razefin-pezereke-rovuriga.pdfIn PDF document text
    • https://wujabadatudipox.weebly.com/uploads/1/3/5/4/135400083/mavate.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/1418500.pdfIn PDF document text
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/gasejaleloko-fiwelidisa-kunitaxe-bipimazuzemoge.pdfIn PDF document text
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/niwozikatavagipil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_6018aff67dada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_6007305facc9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_605ac91270c0f.pdfIn PDF document text
    • https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/mejufanasil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tarajix/hp_probook_6570b_ethernet_drivers_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c46f7e6-7231-44ad-8cbc-cb7f23105a9a/5804926734.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/definition_of_formal_communication_in_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ae08a9-63ac-4edd-aca1-abe71d6553d2/craftsman_41a4315-7d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/vinonikajuxamerun.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/multi_step_equations_with_grouping_symbols_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf071af-80bb-406d-8b37-13b124164dfd/lisolisujolawuxokefopek.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/4592222186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e83966-5e5e-44c6-9477-d2cd421c8ded/sosesodewabonuban.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_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 5804 bytes
SHA-256: b66f4395ac88a5c54d6f49cf891b6685d8c1fc646db23eb527d470dd2d7356d5
font_01_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 10768 bytes
SHA-256: d13f0b47fb19d0b2d8dbaf85037c27b4b58e765531ac1c219dea0b0577bc15c8

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