Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95322746f2704d2…

MALICIOUS

PDF

68.6 KB Created: 2020-11-10 22:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a6a56da683d279a521e726b795b75a8f SHA-1: 20aaf7e1e8ea22679d75990de3bbeef5d8deb934 SHA-256: c95322746f2704d25fa974dddd824309dd0702f4a80de8e1662d4583490072bc
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The PDF contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/strik?keyword=the+promise+of+sleep+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f9247e4e3b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f96ce0be15a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5f985c22ea2a2.pdfIn PDF document text
    • https://pekafajifazudo.weebly.com/uploads/1/3/4/4/134478446/dafd36e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fa5f7538bb27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5f99bb21b865a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8b1eed4a0f8.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/ef5b5a4b-0c61-43a7-8f19-30dc195457e5/gixijojotadavexujinano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa888a4-aa4d-4121-8b02-89d317c51e96/41735023101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241aa035-4294-4856-bfb2-38b51d5037c5/gexagujiwubiwawibukob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e81aad8-5ca4-454a-966b-9db4ac199a45/botox.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_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 5020 bytes
SHA-256: 03ff494cef8c38104c623c677f5a33936a427bff3d6f38c7a278ea6efba0944e
font_01_sfnt_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 10280 bytes
SHA-256: fd4116e0dc98e59d45463459093c50bef130e2ac9b74c38f8bb9e31fde7f086c

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