Malicious PDF — malware analysis report

Static analysis result for SHA-256 2191f365f7810dff…

MALICIOUS

PDF

76.5 KB Created: 2021-05-23 04:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b061447e6e831c5b86b9ef6e45b13464 SHA-1: b042e7e2d4dc969d8946379832a9f4f7dcc5d54b SHA-256: 2191f365f7810dff8c7edc1f2e91caa1078bfe77f56a5c691f48533f1f2218fc
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=guyton+and+hall+physiology+book+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369914/normal_60027bfed16e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fe118b020133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480756/normal_5fcedb55941fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6022f60cc0775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413575/normal_5ff71175f2845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445341/normal_5fec7e9126585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_6047d6b63d343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453754/normal_602eb8524cc87.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/e6867d6e-7b97-423a-9d5f-293baea1cc79/72566983519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df87405-3ecc-4784-ad60-9e7aff3c4df4/gimefabudosokopob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b2d22a-989c-416e-9a9d-4bd5b138f06d/math_equations_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/98913540289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c7c940-99ee-437a-b4dd-9356f4bb3902/how_to_calculate_voltage_drop_in_parallel_circuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fd825f-67e0-41eb-aaa3-29ed471cb42f/java_8_certification_preparation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f215e067-ce64-48ea-bbe4-0dfd6b08c107/62361613757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ba8763-d577-4fd8-8db0-0a63879b7788/how_much_is_bruce_lee_worth_now.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/identify_nouns_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/90735472185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1b2d7d-21ec-421d-9260-003216d7d588/icewind_dale_enhanced_edition_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4afc00-81d3-4925-9d10-47d490a53449/stronger_than_ever_before_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3878816d-6fa4-45ad-9b83-070f2584aff2/panasonic_mobile_service_center_salem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 5552 bytes
SHA-256: 172f7cedb9b83d2c3b212120f732b2b0d62ce1d829e74fc7a6d6f7dfdb75ddf9
font_01_sfnt_off0000f1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 10816 bytes
SHA-256: 25fe3c7fd99a733a969348ade88c48f1a706a46a1685efb2f9afa38429d2cd79
font_02_sfnt_off0001169a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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