Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f0b38a4e7bf30f…

MALICIOUS

PDF

77.8 KB Created: 2021-03-06 20:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 797edc279b255cbb0f5f685d8c8ffcb4 SHA-1: e6bede6aeb8b45079a5ebb50600f986cc9cff8b6 SHA-256: d6f0b38a4e7bf30f3f2f17c44b35ca41e48e1650d42425f88da70c1b02216ece
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/strik?utm_term=tlc+nyc+espanol+examen PDF link annotation
    • https://pagowabelada.weebly.com/uploads/1/3/0/8/130874520/zovewaxodepevu-ketadopigesev-sosesunen-gezuxavi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403422/normal_5fc8fa384fca3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403266/normal_5fec1d491c910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5fef7d7760633.pdfIn PDF document text
    • http://lasns.fun/formato_pago_cedula_profesional_unamkv221.pdfIn PDF document text
    • https://relelije.weebly.com/uploads/1/3/1/4/131438324/zijavugikifuzil_penuxemi_punufi_tipijore.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/bergeys_manual_of_systematic_bacteriologye8xpw.pdfIn PDF document text
    • https://geworusidexaj.weebly.com/uploads/1/3/5/3/135306562/128628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417830/normal_5fe4528e1282a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419235/normal_5ff7bc4058e6e.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/6020ce95-6e94-412e-9e68-824217e11c60/inequalities_in_two_triangles_worksheet_5-7_answers.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_4b0d3034b8ed4ebe8623e2398a735638.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_22c154035ad54d4089c7c3db2c5b9531.pdf?index=trueIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_d095fa4902654123bbc8dbe6cb0b420b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72a3938-4b8d-4e00-93f2-46953af76972/gegogodonaraporowuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1cd34a-d2d3-4f88-99ad-b203d704852f/xarimirefufefolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8d0c1c-fe33-4ff5-8399-0f00d258a6f5/what_does_jupiter_in_birth_chart_mean.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_e042cd6c56164fa28b719dacb304d04c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c565d948-2f04-4b13-8d70-d814bc4acce4/how_to_scan_film_with_epson_v550.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_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 5104 bytes
SHA-256: c948fec48e1c331d970579a2aba2846281ba9a302abe1b7e369c83da090448ce
font_01_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 11080 bytes
SHA-256: 14505e8c1db9b4be8d3a464f1683d5d97e562c27acd1ae3d0a3beaec8e665cfb

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