Malicious PDF — malware analysis report

Static analysis result for SHA-256 34267554a165b8dd…

MALICIOUS

PDF

73.4 KB Created: 2021-03-30 02:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8804b5f7d4f251e2db770ce804d22bb9 SHA-1: 5b84d37cb470a50c777fc2b130a1294ca12b5711 SHA-256: 34267554a165b8dd2d78054a63f571ccda1a80d4560b1895bfbd1a7966a7ad55
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically identified as a lure for 'characteristics of non living things'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=characteristics+of+non+living+things+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6052c356d16c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_603b169c3b75d.pdfIn PDF document text
    • http://vipifud.22web.org/bebefot.pdfIn PDF document text
    • http://zegosuvavanow.22web.org/sonic_sega_all_stars_racing_transformed_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_60243ff4e2429.pdfIn PDF document text
    • http://sexedate69.site/zonerubumibawg9q3.pdfIn PDF document text
    • http://eushopvmn.site/zagos2unww.pdfIn PDF document text
    • http://firstreadersclub.com/cisco_anyconnect_secure_mobility_clikyq9o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5ffc2294ac5da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_601544192a97e.pdfIn PDF document text
    • http://bnl-jobs.com/does_amtrak_zephyr_have_wifi9c46i.pdfIn PDF document text
    • http://specialsale.info/75314838091i0cim.pdfIn PDF document text
    • http://mazers.fun/xoxipeucfmo.pdfIn PDF document text
    • http://souve.me/physics_principles_with_applications_7th_edition_solutions17osa.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/how_to_write_a_good_interview_essay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/ios_13_security_white_paper.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/tatotasogalizerok.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/sisterhood_of_the_traveling_pants_quotes_and_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172c98c3-ab26-481c-b2c5-77920b512153/skills_for_power_electronics_engineer.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/anime_characters_stronger_than_one_punch_man.pdfIn PDF document text
    • http://vafosune.rf.gd/applied_mathematics_for_physical_chemistry_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cec4e2c-076d-438a-a1ee-7a151f367e6d/85407615817.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_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 5384 bytes
SHA-256: 5ff9c0e79b4465f0c54c77ab8d0bebefc9f74f5ed013796586623a0624886625
font_01_sfnt_off0000f515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 10320 bytes
SHA-256: cb038dff4ae2b80fe11890b519a7af0da3757437abcb00e5c3eefd59f5fce291

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