Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d2704927b06102…

MALICIOUS

PDF

48.7 KB Created: 2020-11-07 00:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c932e1b8d6480f3089dd070e7d2c6bf1 SHA-1: 7bfa8b4bc72352a39a9618e38cb7ded9a5a0c028 SHA-256: 25d2704927b0610217e38b65863c0d482e8647488e2848b5eb38c2fb202f2b69
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure, suggesting the PDF is designed to redirect users to malicious sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?keyword=ion+air+purifier+virus In PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/wosemamin.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/kekobimosekuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f89c82facae0.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/nobateva_bikug.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/6916a6ee-7f5d-41e2-a05e-53f6c2c5d2f6/systems_understanding_aid_9th_editio.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/39091698317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cb82b6-ab25-4419-aff7-4ea8d3361d1d/mevopirilojuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a6935b-acfe-43a9-9276-9aad2b6ad584/57644308711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27efeccb-f4c0-401a-bc81-cceadc8d12c4/sonalulasuxumetux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1516f5-4af3-4fad-8a10-e2f6c60a9631/57964213583.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/critical_lenses_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8eecbc-646e-4b93-bc5a-3bbe7ad7a013/5218687778.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/new_italian_restaurant_in_loveland_co.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/tugikajezeloxok.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/rezafivepegubaneviti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a60ce3f-c46e-4111-b797-7e6c309b83e2/on_the_apostolic_preaching.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_off000080bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BF 4860 bytes
SHA-256: 36c1d0c1a312d9c5d94a7950b128b291892336d7407cf531d0bc35fec382a7bf
font_01_sfnt_off0000915f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915F 10964 bytes
SHA-256: 5e9dd6a4ac04143b77fa5ac56b8d6e86e8d25b21ff1df8316326826fa1dcdb54

Open this report in the interactive analyzer, or submit your own file for analysis.