Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca0f36786d35b46…

MALICIOUS

PDF

80.0 KB Created: 2020-11-19 20:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 835425f315e4c5ba0f09132b461d876c SHA-1: d2fb9f9edf9a14de8911833c6ef56043c0816825 SHA-256: 3ca0f36786d35b46cd9f5c13d8818a91e73c500ffa0fa455125ff19ed414a85d
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 0.9996

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://traffking.ru/strik?utm_term=thermal+radiation+heat+transfer+sieg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fa5b0f3953fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f874ac45a36b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f88279b7d3fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5f9a6830d745c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5f97d2e386969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5fb5ea20cfd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_5fb4ffb777627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3ba79cc9-27ae-4420-8b82-4cdc807a6693/characteristics_of_bacteria_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/98883979220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c7b3d4-99ed-41cb-9e24-6707c180efd2/34026785780.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/81671254435.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/40216711914.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/32441372818.pdfIn PDF document text
    • https://doi.org/10.1002/htj.21443In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 5056 bytes
SHA-256: e256a04c36aca345086bdc3c71c281ab1912207afefde2cd00aebc765f5ccc42
font_01_sfnt_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 12468 bytes
SHA-256: 2503e8254768f8e33df137b03135acd932f2d62b1c1f2a2280fff1b9d4549ea0
font_02_sfnt_off00010fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB4 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off0001244e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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