Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da26a74c696bf99…

MALICIOUS

PDF

98.7 KB Created: 2020-11-10 13:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b644316999d4b2c0c459c3d754036e4 SHA-1: 3f6fdd82857ad503dd0f2e29c748e552c9fba6fe SHA-256: 9da26a74c696bf99f5d8a66a45303ad5a632438cefc8211662d7a5b6a30a4a05
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 0.9997

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=borderlands+2+randomizer+reborn+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f8dfb0b81a80.pdfIn PDF document text
    • https://gezofixerofale.weebly.com/uploads/1/3/4/4/134458649/jafofafozunopixuses.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/zovovabimesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fa347498dbe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_5fa5c551579ed.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/sezutuma/juegos_de_un_show_mas_de_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bd4ac7-5b78-4c1f-a1ec-25aac425d232/angry_bird_evolution_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ae2c4c-4149-46ac-ad7b-08721ad9a687/dsm-5_apa_citation_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba78533a-48f8-4202-a54a-954ea804fbbf/padezete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4a94ea-2236-45b0-814d-9630ad55ad8f/wutokijovosofawozorok.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/harry_potter_y_la_cmara_secreta_pelicula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306aaa9e-956e-460f-a840-2a89e10f73f1/plot_pyramid_template.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_off00014647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14647 5340 bytes
SHA-256: 7154909b05799054c1774c0e3ffaa066ac26f919ee78f3ebe23526592be2cc0c
font_01_sfnt_off0001585d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585D 11136 bytes
SHA-256: b2892892bfa20145aa0f245ef6a69227d9c5e861197d1461981b65b0b1d85b45

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