Malicious PDF — malware analysis report

Static analysis result for SHA-256 999029f4f2cf1bc7…

MALICIOUS

PDF

67.8 KB Created: 2020-11-10 17:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 95ccef9bbd16ac242463b0eba89622f1 SHA-1: 27356078ab47344eafce6593feeee7e1c9531827 SHA-256: 999029f4f2cf1bc73fa0815eddbd6f6023bc6f89f9bc55bad9c4e6c73e50aec3
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack vector appears to be the redirection of users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?keyword=pascale+ferrier+2015 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5fa62ebecc827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f90f509b76d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f994cdc430ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407301/normal_5f9b700384b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f874fe6314a5.pdfIn PDF document text
    • https://dinurafilaxu.weebly.com/uploads/1/3/4/6/134621410/7183476.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/5f0aa045-fd47-458c-8a86-5474045d8fff/36969180731.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/read_allegiant_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/download_terrarium_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/wubidesigadiwusukuxuda.pdfIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/is_jcpenney_closing_stores_in_florida.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_off0000cbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 5328 bytes
SHA-256: 96877f8a8238f823f5ae1748a8e4da7dec0bf09e67c1e9395558552952b30cb5
font_01_sfnt_off0000dded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 11424 bytes
SHA-256: c1598b68ac6d8bce2847c966d574fe751f3e57e350e7875a4e428179bd83f5f8

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