Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b92f3a4f8685c3e…

MALICIOUS

PDF

73.5 KB Created: 2020-12-28 14:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d120551985702807aea844a079e7acd5 SHA-1: 93209e6eae96f20fbe504225650494f948fb86a5 SHA-256: 0b92f3a4f8685c3e1368a0c4db859dee69d93e057fc17daacd227e59c6269766
156 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 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
  • 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.
  • 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://trafffi.ru/strik?utm_term=casino+card+game+crossword+clue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461234/normal_5faf67dca172d.pdfIn PDF document text
    • https://sawifotu.weebly.com/uploads/1/3/4/5/134597463/1473912.pdfIn PDF document text
    • https://neranoliva.weebly.com/uploads/1/3/4/2/134266014/kulelezefukijumime.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/Nghdie3/centris_federal_credit_union_omaha_ne_routing_number.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/dgigeBb/the_bonfire_forsaken_lands_traits.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/09b79b16-767d-4f00-b078-aa753eee970f/gotojufomubotutof.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/sgu_clinical_manual_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087b94dd-b573-4887-a3e8-8ca9faab0ae5/gonotololodexamolire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e478dd2-90d5-46d0-b4a6-8bf37fa340a5/limiting_and_excess_reactants_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b1e749f-4ccb-42c1-8225-408b9213325a/68729219984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4edca6-4bfd-4c14-96e9-6d712753c89a/theoretical_framework_examples_social_work.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

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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 5256 bytes
SHA-256: 4b5f622be0e3b78880967e04ad71e56995ad37f52f5b1ccc97d9ef9acb8aa870
font_01_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 10436 bytes
SHA-256: 40f107c05a1ae78210a3f215b15c71895214efc3b8c7fbb39a56d5c2fec7da06

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