Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e335d4d92adc3b6…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 04:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 43690234a48c6e1e4e5941c7fac3b018 SHA-1: ed2fe8df93aa3f31c39d80fec33cd408e6294d39 SHA-256: 5e335d4d92adc3b61e2f92d8d3c8564c9640dd3912ab2d47cd6d4083d446d8d8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains numerous embedded URLs, with one prominent URL being used as a lure for a search term. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=plato+republic+summary+book+7 PDF link annotation
    • https://cdn.sqhk.co/fuzokikili/giiafii/ucraft_free_version.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/hwhfibu/98678090846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_601d20cfac095.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/ibifEhh/jedizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383680/normal_5ffb5f50d4cac.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/4XWEhga/rock_bands_concerts_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/Bhagfk1/xutoruzokovexefed.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/jet_airways_cabin_crew_interview_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480895/normal_5fcdfcb1bbbdc.pdfIn PDF document text
    • http://zujoxuxosaja.getenjoyment.net/adobe_reader_for_linux_mint.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_5ffb91f885cbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fdecb475b7b9.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
    • http://fujesotes.epizy.com/misal_romano_tercera_edicion_usa.pdfIn PDF document text
    • http://visunes.myartsonline.com/we_gonna_party_like_its_your_birthday_song.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/android_tv_apps_malaysia.pdfIn PDF document text
    • http://kevazot.epizy.com/acupressure_meridian_points.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_cdb7bdf67db0476d853a9a48d82f397c.pdf?index=trueIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_2cbce744242641dc9a0f848176e1d5ad.pdf?index=trueIn PDF document text
    • http://gizogebinide.rf.gd/c_arm_machine_full_form.pdfIn PDF document text
    • https://84bc2af4-305a-40b7-847c-8c52cb6b08d2.filesusr.com/ugd/a2e525_bc6b505243034858bb34de6df3a16eaa.pdf?index=trueIn PDF document text
    • http://fazomexaboru.rf.gd/27277498874.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_3a90f3049b4844d2ba32914a3720e272.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5240 bytes
SHA-256: 879e739e917e36bff187ae3b3151a3dbd6378d80558fb92902841a0ef01575d1
font_01_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 10712 bytes
SHA-256: 02b4cb61eb2eaeb10bba2cacf54e693ff3e2b457c5770fdf47d9a9add175570b
font_02_sfnt_off00011f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F87 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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