Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e2ef9e5424d5bc…

MALICIOUS

PDF

68.6 KB Created: 2021-03-19 08:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4472be0903b396013f3fc71cbc62716 SHA-1: cb63f111257775ab010c224d81b15f3a49e8c3be SHA-256: a2e2ef9e5424d5bc05ff717760c30172ece20950cde8fc1df891293a73ebd66d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/123?utm_term=today+weather+report+in+telugu+video PDF link annotation
    • http://zasasibibo.iblogger.org/dil_pe_chalana_song.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/66837658398.pdfIn PDF document text
    • https://gakazores.weebly.com/uploads/1/3/1/8/131856584/e795f.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/fumafo.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/what_kind_of_food_is_popular_in_spain.pdfIn PDF document text
    • https://juwujumatel.weebly.com/uploads/1/3/4/0/134042908/cd066c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_143fe5eb99e848af8c72264f2a0c5d73.pdf?index=trueIn PDF document text
    • http://wilaroxu.atwebpages.com/how_much_does_it_cost_to_service_a_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/65898470363.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/adblock_for_android_tablet_free.pdfIn PDF document text
    • http://dibezage.epizy.com/1839801071.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_1d2674b347a643e7815cb79bae863e37.pdf?index=trueIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_71446a9541174990a59b0a54646d22e6.pdf?index=trueIn PDF document text
    • http://vawofirulev.myartsonline.com/pdf_of_famous_books_and_authors_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/devewasomotesonesum.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/35122635412.pdfIn PDF document text
    • http://levigorofelo.rf.gd/1790434192.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/reply_email_job_offer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/forte_sheet_music_software.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_e6d19466ae3d4448941ce46a67fda536.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/kunalojizejowukigu.pdfIn PDF document text
    • http://sasofinifujilo.epizy.com/84400219808.pdfIn PDF document text
    • http://fiderifi.rf.gd/right_triangle_trig_practice_worksheet_answers.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_off0000cf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF40 5248 bytes
SHA-256: 5048cc90466cf5cf251fef2eddbaafcee8576c10d032f6c219add3fd1daab691
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10340 bytes
SHA-256: e2f3718f63a32d038038fd859cb761e94c4d0bda50a58e117792de84e9ae825b

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