Malicious PDF — malware analysis report

Static analysis result for SHA-256 5604c128ec3e515d…

MALICIOUS

PDF

71.9 KB Created: 2021-05-28 01:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68b8b23ea1466979dd4bf359a723e9c0 SHA-1: ea26575d71b78f0976549c374c7e6f3d1e44f221 SHA-256: 5604c128ec3e515d5a9a6ed6596b539d0b748f6ec2936f08e56a2cb7721cfee5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=bheema+movie+mp4+songs PDF link annotation
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/1689747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_604bae506017e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_606acfc2bb16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_6040b679ba6f2.pdfIn PDF document text
    • https://pozewovuxawa.weebly.com/uploads/1/3/4/5/134592866/9977150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494139/normal_5fd924a734b06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_6057b8dfe561b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_60629c7c91cb7.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/famum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_604a9b3b20674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd7dd7057708.pdfIn PDF document text
    • https://wuwusafofe.weebly.com/uploads/1/3/4/6/134619260/kopeweg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486981/normal_602ed4c66e5ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_603f9ec7a780f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_601b22bcb2962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_6069658e28cd3.pdfIn PDF document text
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/divipepegivo-lujuwuso-bazugepo.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/42a7ac69-3440-401e-a759-457837c71e74/what_is_the_purpose_of_an_argumentative_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab2ea14-bb58-450c-a73c-337b726b0393/administracion_de_medicamentos_por_via_subcutanea_ventajas_y_desventajas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11758301-8143-4f2e-a75e-61e8de0ff4e4/area_of_parallelogram_worksheet_corbett_maths.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB89 5304 bytes
SHA-256: 9cff67a26c0b1828b349c0cdb500a57d7338ae4f7715cb2a422a011c4d00ac10
font_01_sfnt_off0000ed81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 10904 bytes
SHA-256: 6b4e06059c704b618cae6f86785fac7d5804631c0ac2309827816786531de773

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