Malicious PDF — malware analysis report

Static analysis result for SHA-256 40024db731d8dfae…

MALICIOUS

PDF

129.1 KB Created: 2021-03-16 04:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0c0ee27c2860b974ab3e0138bbb69b7d SHA-1: c4e8c99df02b09148a24cb949cd5fe4d73882c7b SHA-256: 40024db731d8dfae3f4e0020925ac11ede229cd65a7af85d603645010e9163c5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=the+original+wu+tang+clan+members PDF link annotation
    • http://help-business-media.com/67904959119r618e.pdfIn PDF document text
    • http://maxiteguf.medianewsonline.com/bored_pile_foundation.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/94562249378.pdfIn PDF document text
    • http://irisca.online/what_is_the_age_difference_between_snow_white_and_prince_florianbat0f.pdfIn PDF document text
    • http://passive-income.ru/vonamedifofawer1c6d.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/74503319101.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/how_to_use_black_and_decker_5_cup_coffee_maker.pdfIn PDF document text
    • http://potaberukogox.66ghz.com/12496025165.pdfIn PDF document text
    • http://emirofficialzm.com/kevujoguvavanined9naj.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/building_skills_for_the_toefl_ibt_beginning.pdfIn PDF document text
    • http://raisinslabs.club/sidudixavedugjfd4t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_899b6f4d883e4ca0ade525224e58a8d0.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_c6614417b4a14ca8949b3ef1e09a7c3e.pdf?index=trueIn PDF document text
    • http://zupitatip.atwebpages.com/keurig_2.0_manual_troubleshooting.pdfIn PDF document text
    • http://dogabofeki.epizy.com/22126624792.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_cbb5459e042e4f59a03070e778a107c3.pdf?index=trueIn PDF document text
    • http://tikokowekujuw.epizy.com/facebook_account_recovery_request_page.pdfIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_721776efc32b4819b996c3d1cd7b61d2.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_5a70d27bca4449f8b7e986c7a8667850.pdf?index=trueIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_09824cecb8314d328e6a8af7613d30ee.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC5C 5396 bytes
SHA-256: 0f27e8dcdf3d404535762e3ea2ea9c7d39f6cfcd64e1e9291b74dddae71f4666
font_01_sfnt_off0001ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE9E 12204 bytes
SHA-256: c1712a271d5942e73ab4ed78a71d93d8da184f020a4e68a0a8faffc7f59f3f4a

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