Malicious PDF — malware analysis report

Static analysis result for SHA-256 457ede136ad04c28…

MALICIOUS

PDF

55.1 KB Created: 2020-11-06 18:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bba9382341790ac3839e14babd2d8670 SHA-1: d39ef46f1e535dfa343b18335f90d1f93489e98d SHA-256: 457ede136ad04c285d4246846b1c1310089952de6a5cd5bd17142a701860694f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as movie streaming results, indicating a link farm or redirection scheme. The ML classifier strongly suggests maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to trick users into visiting malicious websites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=watch+lawless+full+movie+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458390/normal_5fa234cc6c79a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f927b24d0fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5f9bd210f13b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f8a7beb5a45d.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/nodojujotiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f882d0dcf56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f890142ea46c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/tezazivosafirivevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ead1a72-8c01-4287-8ce5-56b1030aab8e/92606355482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae6ebb4-8ef3-4a26-b405-19ccce245ca1/mikaferonekivajebifapive.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://bebikel.files.wordpress.com/2020/11/kaxatazexo.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_off000099b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B4 5188 bytes
SHA-256: 104ab75e288225df1a2c8c5dce29840a9a54e0f292db5029c8b160265125d1ae
font_01_sfnt_off0000ab5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5A 10552 bytes
SHA-256: 3ffaee55eea2470549589009a348bf87bbbae1447028b92df86233b332fd5dad