Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee0c1713f0291fc…

MALICIOUS

PDF

59.3 KB Created: 2020-11-18 14:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7b3b8232ca59158f56c45f9993b99be7 SHA-1: 201231dab750e38cfcbe255365da87cec7f81dbd SHA-256: dee0c1713f0291fc8dc3cf617de0facdefabadf0abbb2983dd4713b899b2ac65
214 Risk Score

Malware Insights

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

The PDF file contains a link farm and redirects to known malicious infrastructure, indicating a phishing or scam attempt. The embedded URLs and the ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to an "Appel d' offre tunisie informatique", likely a lure to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/aws?utm_term=appel+d%2527+offre+tunisie+informatique In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fad4a2e52f9d.pdfIn PDF document text
    • https://vugilove.weebly.com/uploads/1/3/4/2/134234765/3256902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_5faa2f766dea0.pdfIn PDF document text
    • https://rifodomofakape.weebly.com/uploads/1/3/4/6/134627700/892053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5f918d56baa9f.pdfIn PDF document text
    • https://gupebaxederor.weebly.com/uploads/1/3/4/6/134691072/2d05a27ef1063a2.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/tozabufek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5f9ed523be19b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fadf70d256ba.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/bc627587-1327-4dbc-b25d-d4eaf578aad8/45722384718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5f5c88-a587-436a-b857-01cc128e499c/sr20_workshop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/a_jury_of_her_peers_summary_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/new_cutting_edge_pre_intermediate_student_s_book_download.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_off0000ab67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB67 5336 bytes
SHA-256: f4bb8307951dbe3593dda865ba94fa8799abce7cae0887765a1bb57714298001
font_01_sfnt_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 10136 bytes
SHA-256: ebfff60634ac35d68cee056539fea017c040ad1da4278175b724b143fc76f7d4

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