Malicious PDF — malware analysis report

Static analysis result for SHA-256 718e7be0fede42b8…

MALICIOUS

PDF

75.9 KB Created: 2021-05-16 02:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 72fbe3a69dbfedeffc0b47a0eb628799 SHA-1: 57784ec3351007b5ed8bbcc62790a6007eee0c89 SHA-256: 718e7be0fede42b8481de9a942149a1ca5a0fa68a4ada88cf57881c5b50be382
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/strik?utm_term=how+long+does+osha+30+training+last PDF link annotation
    • http://huseyincanx.com/12171816735znxcn.pdfIn PDF document text
    • http://zukerazewumalu.iblogger.org/dubekomogemitafodudon.pdfIn PDF document text
    • http://mkuu.club/toastmasters_speech_evaluation_sheetm6lzg.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/mheVjfu/misiduwof.pdfIn PDF document text
    • http://reabook.online/which_god_is_powerful_in_the_worldrhvaa.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/aKO5sij/golf_battle_ios_tips.pdfIn PDF document text
    • http://sajitalunaded.22web.org/jaxetobiwuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/jiicxOJ/gunusubobomovibolafe.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/jjwxicG/zurew.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/QYdgh1c/zelosotil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_ace14da3221c4c19a0089ab2f8fb6971.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_a9645dffdbfe45eca465d0a1a1c18804.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_126b076ca37e4efc9995314884679f37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac0763d-e9a4-4341-91e8-8791588c6cbe/32086159949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d025dfb-d460-46cf-81ff-e03d005feb5f/best_way_to_translate_chinese_symbols.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_3a667d078d8746bfbe28113773d2fa1e.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_4d1b5cc63f1646cc8fa011c03aec11ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/155ad048-f5a0-45fe-a435-f7d1c9c48256/agile_software_development_methodologies_benefits.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_82683bc9ebe64714a6716c647e7c957f.pdf?index=trueIn PDF document text
    • https://72be5e1b-4d14-4335-96ee-88463f604c48.filesusr.com/ugd/57ecfe_47d3ce0b8580466c967c6a0c00ffe666.pdf?index=trueIn PDF document text
    • http://jufomotapi.epizy.com/917639983.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_495b54f222d04df892f916875667ab01.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 5448 bytes
SHA-256: a4a36a4e91ca8c2a370bca650c0da0506797e9a587c3bf656ae25c0039cbc9d8
font_01_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 10664 bytes
SHA-256: 089320d1c80ef58359e5c019724036dbeb01bda69f069a427d931b6d339f8f65

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