Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b27888caadb9e7…

MALICIOUS

PDF

90.0 KB Created: 2021-06-04 03:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 83ce8651191ac3ac447b90e04890a479 SHA-1: 1146e101cdcd49caa03882d0c8ab27187aaa3763 SHA-256: 23b27888caadb9e7855e09da7c78bf4a544a4dbf1fcfe2e655fa1fe80e700520
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://ketchas.ru/pbw?utm_term=livro+fisica+quantica+na+vida+real+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fec1f8d66148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5fe763d188735.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_6001fd9c5e381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426550/normal_5ff899471fa05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_604fbbc6cbf4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366305/normal_5fdd48928d7e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408352/normal_5ff2f19e4fc99.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/66c8e2a4-d138-47e1-878d-f10ee4507085/how_to_begin_healing_from_childhood_trauma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd844c9-c6bc-486f-a60c-ce19babe8735/tojuxofelemuxamadir.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144415797/fedefemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a97dca-6846-44f2-bbb8-679da989bb96/pujof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c6b102-b2b4-4dd4-a658-4581751948cb/32346055773.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/w/file/fetch/144575586/marginal_and_absorption_costing_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e68189-2bbc-40a0-bce5-eac2eb20b002/hoover_dual_power_max_carpet_cleaner_manual.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144440025/atoms_and_elements_crossword_puzzle_answer_key.pdfIn PDF document text
    • http://xumefosux.pbworks.com/f/how_to_install_220v_outlet_for_car_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72458ef8-c775-4664-8dcf-e100a8ed0812/selefinerejarepekim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c838e41b-82b6-4cc2-b6f8-c63841cd2000/what_is_the_best_cordless_miter_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca30bb51-29ef-447e-9263-dfc3ef6d90ac/50750154463.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_off00011f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F36 5276 bytes
SHA-256: 8c6df582d1eb58a1fc3bdb3fd783cbacf8101fc236d83822b2b90c2c548b0467
font_01_sfnt_off00013146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13146 13468 bytes
SHA-256: 4511c9c8c80ea588907f99dc9c2865e4d057e8556bedab9d76d1573d358dce23

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