Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde0c8a312f36db1…

MALICIOUS

PDF

73.8 KB Created: 2021-05-25 03:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6c7d1042a6104b3a491b16011d07c160 SHA-1: c79f82e3ff18b5504001cdf06f786dac50a2b4ff SHA-256: fde0c8a312f36db1557971476b9fca931ffc88a1f2bfe68abb2b173fe3a4a9e6
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 0.9999

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://leonvi.ru/strik?utm_term=nuclear+chemistry+review+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381735/normal_606bfd398c1ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5ffce1956adf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_605fada347e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_603e747358d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_606e45e96c712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_600ca5cac1c02.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/defujo/android_10_alacak_telefonlar_xiaomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c07f5f-d1a9-44f5-9afb-1ab87257c300/72501026357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba18d25-77bd-41cc-be6d-2b2bfa879c8d/tenemozotedof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5e35b5-a6ad-4420-88f5-259e82cb9b95/what_is_gram_positive_cocci_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/neuraxial_block_and_anticoagulation_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb74233-d97b-4efe-ab2e-7d1b62f99c85/geometric_series_common_core_algebra_2_homework_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09da31b-bec5-4703-82fc-bd136b4a4c14/3016116512.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/miserodakovat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf7ce5d-6185-45fd-b6c7-a308c724368f/63439023523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a1afd7-78c1-44ef-aa4e-704b56bf4e57/edward_said_orientalism_introduction_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63b2895-f114-4d2a-acd2-636821693abd/determine_the_force_in_each_member_of_the_truss_and_state_if_the_members_are_tension_or_compression.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/3842442890.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_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 5324 bytes
SHA-256: 258d5ecf7344567b249546e01081e29a9c045873d42ee5aa05539f33babb1c79
font_01_sfnt_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 10756 bytes
SHA-256: e803c8b65a71e0a942382fddaeac622335cd32a21316e925fcc065f7f02ab2ef

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