Malicious PDF — malware analysis report

Static analysis result for SHA-256 0299a47e4ec53a87…

MALICIOUS

PDF

68.1 KB Created: 2021-01-03 05:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a4dc22ca0bb0380d4093f4bbc5e916bc SHA-1: 4a0956758fa6c11096b5d890cbf774965a04252d SHA-256: 0299a47e4ec53a87cf9dd8a73ddf61f6b47401ff30bf45b5b062e9562df58165
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with at least one pointing to a known malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://gettraff.ru/aws?utm_term=handbill+template+microsoft+word In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_5fc64cdec03c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5fa2d95fc90d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f9238f1c7ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5fe8b3e3dab6b.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/9863584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5fe7704386ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5fb9d773aad31.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/jegghcy/30681725892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5fa57ca297376.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/df825e63-7625-48e4-808f-4ce5030ade89/83065950896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e0cb41-7bc6-450f-8e90-d1ad470cd10b/73364733420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7a2119-2c24-4748-a6d5-7660e0cb168e/erosion_genetica_que_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5765df-b687-4947-87c2-3dac72ed224a/86885264686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a706e68-d747-4bf1-8a82-a7df1cf2e499/xelinatuzusefo.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_off0000cdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD2 5492 bytes
SHA-256: e9b7507846bf7b9303ea7448501ca4b7709a467fed240318c04ee3fa735d05f9
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10348 bytes
SHA-256: bebd774a126b4e87ec844675583827737a69bbd738393f2145df99e296c9e10c

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