Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e611ec971a0c0bb…

MALICIOUS

PDF

77.9 KB Created: 2021-03-06 01:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 920d3ffed618ee79ac58913f5000cfdb SHA-1: ac60235d4ebd967ebff19c993158552ea32ae769 SHA-256: 7e611ec971a0c0bbca53b02149eab0caa36c9d7bee4943a1f0795959815d00f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('resalured.ru') that is likely part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF structure and embedded links suggest it's designed to trick users into visiting malicious sites.

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/award?keyword=blood+bowl+rankings PDF link annotation
    • http://vipimuxatomefi.medianewsonline.com/68111012627.pdfIn PDF document text
    • http://kefovatoxag.22web.org/63152152104.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/55729400887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486971/normal_6002c641a31c7.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/how_to_use_a_yarn_loom.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/on_the_incarnation_st_athanasius_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_602f9becbbe3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fe8f284efb24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5ff3e1418d236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_a39a8ff4a94d4be4ad38efbc9c85eb6a.pdf?index=trueIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_087b4bcb985144e79671ccac2c6ea1df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/473febe5-5f0a-431d-8095-9752b866e348/paintball_guns_walmart.ca.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/canon_rebel_t5i_details.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/66926220833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83d7bb4-cf39-4c56-a17e-e0a5acd7c85e/tebuki.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/food_service_interview_questions_and_answers.pdfIn PDF document text
    • http://joriboka.epizy.com/binance_desktop_app.pdfIn PDF document text
    • http://gevowurarabaj.rf.gd/android_antivirus_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471c2fbb-2369-444d-b9b1-c9b4a71a0ba7/wogojus.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/corinthians_uniforme_2019_20.pdfIn PDF document text
    • http://pumejusatojajeg.rf.gd/37640970481.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_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 5336 bytes
SHA-256: 2544f9fc23412cb302cd2c0b444cbd4b18da1bb6f5319effd8f12e51b9cc333e
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 15024 bytes
SHA-256: 93800d0011921e847352f7dbdd6e4700701da25b413682898e174f2c7e46803a

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