Malicious PDF — malware analysis report

Static analysis result for SHA-256 469e84382b8bb89d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 11:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a51673623bfee10b775f3e2bfb7a0a4 SHA-1: 5aedcbf65af38922cbd0c51415d97d41b46b1fb4 SHA-256: 469e84382b8bb89d81340484043b2ba24d76d8615b7b8bdd0ff99727d5efc752
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=ninja+professional+1500+watts+model+number PDF link annotation
    • http://rasidafepu.mypressonline.com/40247049124.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/jaloro.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/Qdw5Fjd/77788786549.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/is_there_a_black_man_on_the_2_dollar_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/iBDzcLR/pojigifamiwi.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/physiology_coloring_book_free_download.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/0d2a371a-0b5e-4fb9-b0e7-25728703649b/7849921264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c3cda6-9728-4887-aede-7968b8bbaa21/85621832678.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_5de00292eb5246b3afa02b72c58c7c2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cedf0a9-8906-4468-978c-8fd1e09587b9/course_2_chapter_1_ratios_and_proportional_reasoning_test.pdfIn PDF document text
    • https://99104389-a8e8-46b3-a188-4b62913af25a.filesusr.com/ugd/8d46c2_26035ab4e2cc4cdabe0fe0daf9173b2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b317eb0-3fab-4003-9e8e-f285843297be/venononixudedifil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd92d70-96b9-4d03-acd2-a4f46be3c70b/kung_fury_movies_like.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_34c4ab55e6df483d8b28d03f0b54cd39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df0e662-4e55-4555-a15a-b20f3051dfbc/34516018500.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/why_are_gluten_free_foods_bad.pdfIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_0ea185e5caf3499b981fdda3f77b5be1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/68799559727.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_44a16aeb96ca420a8b2cb95a6e11dbda.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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 5784 bytes
SHA-256: dd1799b1cb57e4a0b8a5517d6128077857e278e7874bc1b762a553c9fcd7b13f
font_01_sfnt_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 10408 bytes
SHA-256: 12c128d0e7d0d0a30236989e755c238a69592731861e7d7449a21c3774bab16e

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