Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ce790a1d7d5a69…

MALICIOUS

PDF

65.4 KB Created: 2020-12-19 17:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 876792572acdf7fae6d5d507edb20056 SHA-1: 16dba44c350a9b00132aa7ddd222f3c0d79b7bde SHA-256: 06ce790a1d7d5a69d2e04c427baff6ccbb4d0b7711a8dd96f5d846e1cc1d90ff
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a known malicious redirector and a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, appears to be a lure related to French verb conjugation to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=how+to+conjugate+er+verbs+in+french+passe+compose In PDF document text
    • https://felomavemupej.weebly.com/uploads/1/3/4/5/134583365/979f26582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5fb75e1f12c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f9d45b714ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5f97327dc46ca.pdfIn PDF document text
    • https://gabodudir.weebly.com/uploads/1/3/4/7/134717456/1615543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5fbbc9aee31cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fc37baa96fcb.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/b619507d-4d18-4da4-9694-9c5e13d5c013/detaviga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac07f07-975e-4bd2-a28f-7850362a75f6/citrus_county_sheriff_police_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54949d51-dc7f-4f70-bdf9-d97427481e33/najaxikafi.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/charles_law_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/tilolaxopoxulazo.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_off0000c21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 5724 bytes
SHA-256: 7a87e4f1eba3543ea4b47205283f9db59c767b69658bb406c3cd1ab2d53fdf1e
font_01_sfnt_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 10664 bytes
SHA-256: 1448286980296f82e244290980a77cfe1235e2cd273c91b71b372b34b864cc69

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