Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b69e0decd5c905a…

MALICIOUS

PDF

86.8 KB Created: 2021-03-24 01:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 89202991380a1c95dbafb1532a7f19ee SHA-1: 9e0a0f195fca87033256a74c8f0d2046f238751d SHA-256: 5b69e0decd5c905a9e3e6a91190f80afe5059915951ecfb1ad85242e7f486499
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to potentially malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Goldmine record album price guide', which is a common tactic for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=goldmine+record+album+price+guide In PDF document text
    • http://lnstagramverifiedbadge-form.com/79984484776n2jg0.pdfIn PDF document text
    • http://tasigezagu.scienceontheweb.net/notisef.pdfIn PDF document text
    • http://copyright-central-media.com/fedanexagawirugigadegogo2wvn4.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/walir.pdfIn PDF document text
    • http://micrometer25bill.site/23323305923jy0h4.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/pdf_viewer_add_on_internet_explorer.pdfIn PDF document text
    • http://winoorama.site/hallmark_movie_christmas_list_2020u46u2.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/how_to_get_cleared_from_credit_reference_bureau.pdfIn PDF document text
    • http://venira.su/99697764516x1t7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f35f3f8-aacc-4ac9-af34-3d15e08c3fdc/pl_sql_developer_resume_5_years_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372e3bd5-8810-4f97-936d-014577c1e4fb/7591561082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c698aff7-ef7f-449c-8181-5d8d76f24c0f/wurigowerajumabosexakepe.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/game_guardian_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca1b856-d5ef-42c1-80f6-190c9df9b25e/anatomy_and_physiology_books_for_nursing_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97685cbf-9335-4b47-a3f0-c02f01d5e56c/6237888832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eac66f8-cdc2-4158-b14e-a92f4100e7e6/soditudaruwexobarus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da30b3e-fc0e-4cb1-b9e6-6edd5053eb38/how_much_do_graphic_designers_get_paid_per_hour.pdfIn PDF document text
    • http://jupevesu.atwebpages.com/borderline_personality_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815e0a4b-1432-43e5-9d8b-919843ee1de5/92938010125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4aa9c7-9f4e-43a6-8afe-103979132342/57881320747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d032c951-6969-4d76-9d27-6ea07176f308/87987578036.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/tonewipipid.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_off0001138f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 5384 bytes
SHA-256: f1871ba0c3fe762185239948e620775612e4f7d9dd37c4e4e59a3ba786ddd4e7
font_01_sfnt_off000125c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 12096 bytes
SHA-256: 8a322633aaa6408c07879b65b924087d21dd335cfb6f05ba68eb30171856b193