Malicious PDF — malware analysis report

Static analysis result for SHA-256 9440978ac28ca3fb…

MALICIOUS

PDF

67.1 KB Created: 2020-11-16 19:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 102d36ce9daedc8f01d3f96622d8fb65 SHA-1: d68f9bc29aafc06ce023d3d20476771df22e196a SHA-256: 9440978ac28ca3fb95b4da0ef9fd863b9f234e28e5f5a129064d493b43e8bc90
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=oil+funnel+storage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f88f69b5ba79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fab2c47664a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadedosi/wfmj_tv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3fe1656-73d5-49b5-bfb7-f198be179d1c/62854255621.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/80891524032.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/tibosanunetogotus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82a6640-54a7-4411-b31c-01c4aa93f99c/9595528483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9599c1b0-fa15-4dcc-b54e-b4a62ccd8bba/how_many_protons_electrons_neutrons_in_sulfur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d828813e-1d5c-48d3-ac1d-f5219128adc5/43688360515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3421ab6a-66bb-4b29-bad3-675eca741182/90484751356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dc1351-6cc3-4f43-9178-5f64a54acea7/introduction_to_rocket_science_and_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7ce86d-8be3-4414-80aa-f1446bb07042/97785825471.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_off0000c999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC999 4964 bytes
SHA-256: be6bcacdb0ba46696bf9915a30e97ac7dddf6fe05409d47924be575633f9f690
font_01_sfnt_off0000da8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8A 11136 bytes
SHA-256: 4bf546fc1bdc2f62f18399f75213f4f4c9217399df1fb81dc41e8e2febf978cc