Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffadc885fdbfc2a…

MALICIOUS

PDF

122.0 KB Created: 2021-05-27 06:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3fa4e25923e887b32c172262c2845b17 SHA-1: 23f4c1b7cd53e94c901be282209ee6e096609028 SHA-256: 0ffadc885fdbfc2a35024944034e06ae90cf45f0aab79cc958307e8f63b3ab6d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, https://mezovuduw.ru/strik, is likely used to host phishing content or distribute further malware. While no scripts were explicitly extracted, the PDF structure and the presence of external links strongly suggest an attempt to redirect users to malicious sites, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mezovuduw.ru/strik?utm_term=spectrum+common+core+language+arts+and+math+grade+5 PDF link annotation
    • https://xowivana.weebly.com/uploads/1/3/0/8/130813667/xatajize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_606dfdb271eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fd66014b8986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_6044748663b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_60288a81c6dda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378618/normal_5fff173e64b60.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/bfb20b8a3a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_606caec28a7ad.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/8d3c2730-d5b5-408d-adef-cb47f1e9e859/ff7_walkthrough_after_kalm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78deebc-2156-4ae3-a86d-c777d3099a7f/librecad_vs_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9520b50f-b40a-4ddb-8019-9c03ee9b1d0f/95084325352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9492df5-7736-4001-af8e-a01c31d54b37/8061731604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d39776-7ba7-4d8c-a846-3e1de3faa1c6/times_tables_worksheets_printable_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85593d1f-2397-4566-95f5-0686ace6e869/fevetofidofazofisutixovaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35d1db9-596f-4435-bccf-aab9de14052a/the_human_centipede_1_full_movie_download_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a84f4e79-8b37-4ae4-a0e8-71fcfe142156/what_frozen_foods_can_you_cook_in_an_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e3dfd3-89d7-4f69-9f87-6ac891d51cf0/73736137828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e616a5ef-472a-4c6c-960d-8b61efedb923/difference_between_clearstream_2max_and_4max.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48dc7e1c-f839-4f9b-a5c5-04d442451ab9/how_to_write_a_critique_paper_of_a_story.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_off000198c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198C8 5712 bytes
SHA-256: 4692ee6f2f112747c0710f86a2ce1179daa5575a9ebcbd12fb4a45b462df3e49
font_01_sfnt_off0001ac0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC0D 15184 bytes
SHA-256: 05f7a44cc789dfe54b9acc13f5de03515c75a12e203ef4503b8d07f23ed81658

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