Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b11de02596c1bb…

MALICIOUS

PDF

67.8 KB Created: 2020-11-10 12:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 28c172abf9ef45d635267f376d9624d4 SHA-1: 9dbeaa5200add9812fa6b7b6d0876ba35b547b02 SHA-256: c2b11de02596c1bbd2e40c9f45468384c250dacc05009e97d55d62eb41bb43a3
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://traffnew.ru/123?keyword=football+pump+up+songs+clean+version PDF link annotation
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/vebukiju.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/lefikofo-xiwixunurowep-lamoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f8ee5989cc29.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/443943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f92c445e9639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f998d183dac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5f9e963dd7d30.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/welabafusojonuwuvasa.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/f7afd264-f333-4669-9c58-b6ec97639c8f/resumen_de_la_pelicula_el_ultimo_cas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf8a6d1-7afd-42be-ba6e-e98703570a30/devikosagetokikuguvesemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c04f6c2-fee7-4f38-aef0-1c3a34df8f1d/83019372365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d53428b-c4d5-45ae-96e1-a1dfd739b95a/john_hardie_siding_installation_guide.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_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 5408 bytes
SHA-256: 919a006a63c2e68d09c4425b5a36f2dcd569d9565e9af8d07163b05351ccfb2f
font_01_sfnt_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 10756 bytes
SHA-256: d9a488f960492d504bb5bb7a729535613576fe3b9af2ed1ea1c0eec371234a1b

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