Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1e5c7b1f2290eb…

MALICIOUS

PDF

74.5 KB Created: 2020-12-05 04:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e42e1d4d7f96a493e80053a962a34c5b SHA-1: b7f9f6ee83867e85f839a7fad53023279f9ac10c SHA-256: fa1e5c7b1f2290eb840a07e230371d93c1a1290d363ff5769a2876b4ebc74612
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://traffking.ru/strik?utm_term=me+without+you+book+pdf PDF link annotation
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/nivakejujin_lozubo_rumitumip_xizonazebus.pdfIn PDF document text
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/828d90a5.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/b852ee4297f.pdfIn PDF document text
    • https://zemuxarasojutin.weebly.com/uploads/1/3/4/3/134374283/ratebabelojonamum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8ca506d9581.pdfIn PDF document text
    • https://ditoramaw.weebly.com/uploads/1/3/4/7/134724618/2591541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415524/normal_5fc3c1c71a298.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/b2d47a73-3899-4321-9a91-361068332d0f/filme_cu_transexuali.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/date_sheet_12_cbse_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c731dce1-bb48-4792-8a1a-f2b4857e1377/ruteramo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126f44b7-2740-43b3-9860-66399b6fb37b/36261940167.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09b16457125654013e22/1606289841461/kosovufijufumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fa006c-6203-4065-baf3-864092ef51c1/72405525967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f856f115-14b9-46b1-89b8-13a2cc5a40c5/99022019995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bfcc1d-47f6-445d-8cbd-8ebc98adc073/diffusion_of_innovations_5th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e552ec917750a3d7e003/t/5fc24361eaf37e3b64e6c718/1606566755010/list_of_connectors_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1558344-f9f4-4f5e-8447-04cda95c84a0/93454983830.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_off0000e73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73E 5016 bytes
SHA-256: bbe95ee6e542a53a4cec5e3a11bef583b7bc3f00dbb50586f9b2e3b434b2870a
font_01_sfnt_off0000f873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 10644 bytes
SHA-256: 5f226a6212cc6ca9204a40c75e50b45340fa78cce956d87280f5f31bfc6588f6

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