Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b0c369fa71f6d8…

MALICIOUS

PDF

76.0 KB Created: 2021-03-21 04:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bbd63bc7a0a0c73853e63850baac1207 SHA-1: 9dca20cf3965f1db6217e452ff28c33e858c1190 SHA-256: 06b0c369fa71f6d89c77aa67e3a4959295bd10143dde6b6e38095c3746b1dc85
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 0.9997

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://crophysi.ru/strik?utm_term=experimento+modelo+atomico+de+sommerfeld PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5fd8960ad1f57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5ffdb34bbc476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488330/normal_6047b35d63e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527108/normal_6047c563f3bb4.pdfIn PDF document text
    • http://liketime.online/what_are_two_uses_of_thermal_energyh4xxb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_5fd8c0d7b1608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5ff33adaeb7e0.pdfIn PDF document text
    • http://businessoutsourcing.org/70502140407inynz.pdfIn PDF document text
    • http://tryplafond.xyz/idmss_lite_user_guidelnpqc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_601606cf492e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367674/normal_6008f1dd30ae9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_5fdf00b73d293.pdfIn PDF document text
    • http://vunipofuwaz.22web.org/ap_calculus_bc_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_600deeb05893b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_600537ab19747.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_a7afd8cf7034430ba44feda553adbd29.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_94994bf29e234e63a77c9d3aaac0c0e1.pdf?index=trueIn PDF document text
    • http://kunasajijujaf.rf.gd/vasam.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_271387d3cd9643839d2c835336e56931.pdf?index=trueIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_29dd0d1f41f54c64a2d28c73517ff614.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5328 bytes
SHA-256: 7e32a0cb981405e78ce6d780249e045cdaebc5dafbd2584a1264e0ada16f17aa
font_01_sfnt_off0000f8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 12424 bytes
SHA-256: 460d8be72a9bc853e0f9cd46280b7f1a5ac83f53256080dbfa8b1d6f49ad0a32

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