Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb3892c8c1f7b00…

MALICIOUS

PDF

74.0 KB Created: 2021-05-31 06:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ef8affad6cd5a4533117498972592b73 SHA-1: b659bcbb59a5898c1912ff24143ebea114f2f163 SHA-256: 9eb3892c8c1f7b00e63653ca99ea9d573d44ec69f2af93254d21a0a52a3c9925
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://crophysi.ru/123?utm_term=ics+700+b+final+exam+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417032/normal_5fd3be09df8dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6013bee4561f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fed75b80367f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_6012dd635ab7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447085/normal_5fe75968bec05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_6025f34b2e487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_6024efa5df639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_6045010501c8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5ff65a92383a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491437/normal_5fd6b1f1a2ca4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_600148f8d8d2e.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/4e19dcd7-fe31-4122-b16b-b4e255ae5fef/summary_of_she_stoops_to_conquer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f76e36-d3a1-49d9-b9d6-295640bef749/menesomezovakop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20175299-b39b-4534-9b61-b0a7879bf2fb/letezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef4e11a-7cc0-4eeb-a430-49ff7fdf948b/dyson_v11_animal_cordless_stick_vacuum_black_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f9c08e-6d44-4cf7-8d18-8110cde6b272/samsung_vrt_steam_washer_pump_filter.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_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 5488 bytes
SHA-256: 52b589f621ad2a26d910506aa846bf58d57fd7d6bc3a554800d824dcb759c961
font_01_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 10564 bytes
SHA-256: ece5967643b25c3183ae5d63206902b65b48e60c0cae158de6012fd74701cf38

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