Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57a56237f920577…

MALICIOUS

PDF

153.2 KB Created: 2020-12-22 08:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 55b39c5c4bd81b4c7e6697e4076ec22a SHA-1: aba6a786ab1941b488788bcaa6c2f8623a45aa34 SHA-256: e57a56237f9205776be74039330674aedc193c59b26258b2e1905cea7a06cdf7
154 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=missiles+fired+at+tel+aviv+today In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f8c80875634b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8ac5f41b53b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f96974361fdc.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/1ff54167-d860-4aef-a5e1-c2edb77bc018/24581303044.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ed0e9f-7e2e-4c55-b2dd-22f343598d43/13478985829.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/68235631375.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/55032188955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1398047e-d741-4cc3-92d0-f6da5e2a3189/sagunavitopup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97572c40-a834-4e9b-b80c-e96eb81d5474/konamusoxozirafirurato.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/jomevaja.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/merge_multiple_foxit_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/map_legend_definition_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf40088-9be3-40be-a084-66b36518b9a2/29567317802.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_off000215dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x215DD 5068 bytes
SHA-256: d37e2d77b04c355334f6ba0e499a252a21deffc2dbcb982ad160a8e3efd3b650
font_01_sfnt_off0002273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2273F 14104 bytes
SHA-256: e8c4ccf4670723a9e727c65d29e09921f92d0047d38508ec6426210b3e981fea