Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f8f95439d89f8d…

MALICIOUS

PDF

69.4 KB Created: 2021-01-01 21:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: efedf89949a09a554abc642ec8852f82 SHA-1: 08d8c54bd71c53c00a2391da02ba2c1dc085c722 SHA-256: 66f8f95439d89f8d38a7e9647f93c8836ba2f7148b6d767fbca42e69d7b2bbe0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, traffmen.ru. The document body, though heavily obfuscated, appears to contain text related to a 'special agent fbi job description', suggesting a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

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://traffmen.ru/strik?utm_term=special+agent+fbi+job+description In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fbb48002ce4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415525/normal_5fb2afbc44078.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/xovekolamoxe/97886645984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b249a68-a910-42eb-9013-5fc1f24db249/pregabalin_side_effects_rash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7990d664-a07d-4fe6-9354-f1a13e6e7272/wuzadotirufaba.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/rigip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e000c933-e60b-4853-a933-ee75b8293af9/nudarejidigugotawefamig.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/which_of_the_following_about_the_biosphere_is_true.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f899733d-bcd1-430b-99c3-cc545d169bd6/61243229211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7829ffe-4a03-472c-a29f-842fadfac410/piporipogilibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989a13a7-9335-4cb2-90d9-daac240bfed2/tibewowoburifaxani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadacc17-d135-490c-b69a-5b92628605b6/xokidasuvibenigasujato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87809c8c-df29-440a-8109-c36852924840/norinevetuwugekaruxu.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_off0000d204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD204 5640 bytes
SHA-256: c4cd7af4e5701a0ea1955bfa41bb71b6f30001362af319cab8423424e004e078
font_01_sfnt_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 10500 bytes
SHA-256: b321c330416a1ce0d800931c59b77e367979659177f891beec432be462a28cba

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