Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d55c1ef949d4100…

MALICIOUS

PDF

73.2 KB Created: 2021-05-31 17:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c292c310a029ad7124f82b0e3e438a73 SHA-1: 5111388d6f8cc9aea443e267ef08b39484e3865e SHA-256: 4d55c1ef949d4100c1f2ce8147950c88eb03d69e52d843500e0d701f0bd30252
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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://dugedepap.ru/123?utm_term=coles+lasagne+sheets+fresh PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415544/normal_604a26d3a22ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5ff09595b98a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_60372b13cd044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479223/normal_5feeb96f40d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_6046293abd305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_6009d0be2b4b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fcee03395ee0.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/5d77db72-7e91-4260-9143-41f9a4f9e503/what_ingredients_are_in_calzone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf01ac3-d55c-4633-8cde-34a17222093a/kaputaguzozume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a216013-5306-470f-bb5a-7bfe1552c08a/45718000068.pdfIn PDF document text
    • http://xovelezid.pbworks.com/f/blox_watch_code_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a4e4b-3a9a-41b0-8e80-d8cbbc4a4002/rodimisuxapipuwogopewoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bc1867-7197-495b-9f79-7c80f3abd96c/simple_interest_word_problems_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28107878-91cb-4141-b6a9-ff5339c5ebfd/best_way_to_treat_meralgia_paresthetica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722d3f16-2f6d-44c5-8a17-345ff2a5c45c/mokirupizorixit.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/kotiganajatebizibora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80e51f1-e05d-4a9f-8f16-a1073391a174/dell_v313_printer_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3f78b6-3935-44aa-880b-0ba8635d304d/how_to_make_a_motion_activated_light.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_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 4936 bytes
SHA-256: 7511314cc55c93089edfa0c38364a8ff303e863b003d1067770c693e3812efbb
font_01_sfnt_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 11204 bytes
SHA-256: 0c73b80beec0b66dc8b626a18c617d21e4337ddb267f0ece3562bbeeade99191

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