Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e8ca98e54c0f3d…

MALICIOUS

PDF

67.5 KB Created: 2020-11-10 15:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 69b8361cd9d6ac7a5c3693c71cca7085 SHA-1: 9e24d6989d28918735be7f39fb0ecc5b2687ad73 SHA-256: c3e8ca98e54c0f3d3f211bf24d22a82e0a0d549d5d62ce7edb1938e1f2823582
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?keyword=medford+craigslist+gigs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f935e058abe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f9624b12dede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f87d1c1282ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_5f9c2732d49bb.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/gifiz/lehninger_biochemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/zovepejefuturidaxoxexemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0eeba9-d2d5-402e-9004-5ab083453cb6/64883804289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae70f72-be56-4dfc-bb88-5fed459ed14b/72447615249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f269a297-d481-4ac3-ab29-0b9131dda217/rwby_beowolf_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6590f382-f914-45f8-af0a-0562e040ff07/fudejaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0731f2c2-72d4-478d-ae44-50ca0c1943d6/25707922309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3333fe9-052e-4b58-a7b7-8764bcaec20b/2514304266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd58dfb-813a-4466-8ceb-276768d22a79/star_reading_lexile_conversion_chart.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_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 5196 bytes
SHA-256: 5b649317e9c6bbad551296efd02c8dd3459eaa56f740afb0ee87a4c07a2cc17e
font_01_sfnt_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 10412 bytes
SHA-256: e8f7430f6209f08fc47dfe2703558600363eb6ea96519c6ed4eb785e27f34fb6