Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e46dae2f94561d…

MALICIOUS

PDF

67.2 KB Created: 2020-11-18 14:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 23885936a9770f704c8ed8d1587f1c63 SHA-1: 7773fb962c477f12f2030393c0edfc26cba6f8b0 SHA-256: 78e46dae2f94561d99fdf71ef316c6513c5db615498efe65253aad842246bc54
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, including one pointing to 'traffset.ru', suggesting a link farm or redirection to a phishing site. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit users through deceptive content and external links.

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://traffset.ru/aws?utm_term=report+phishing+email+paypal+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f9558548dc4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f873b1c5d49d.pdfIn PDF document text
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/5628592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_5fa340e6a8335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f8d5bfb7ec1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fb4bb4e9ae64.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/nupemig_bugerunobuzemaz_gokuvilusun_vawulil.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/mejobu/add_ons_google_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9beecc11-70d9-4eb7-9f2f-7e1e9a511b58/nobidokoxuroramimajel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4f2578-9b1b-47a0-8295-b8113460d255/gejumepawuver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34875631-1e7f-406c-b6ed-72c8491566a8/tenenojidofogobipivora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad84cb0-b91e-4016-a0c2-366f1a1c4e3f/crazy_games_strike_force_heroes_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10708ed-dc2e-49a8-929c-0ad68dc7ab7b/uncle_drew_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5302e8-c112-41f3-bc29-d384f56bf4ec/23471544720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664e76b7-9081-4c1a-9020-68b1fcc89e92/rokasejotokizarijas.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_off0000c9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C1 5408 bytes
SHA-256: 8914ae7f54a01d0b87a1d5ef0af5fd5062e5be8725f24fc854c5e5c9cb90abde
font_01_sfnt_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 10632 bytes
SHA-256: 9122e647212b890755dc58b0d65a0df2d555bb09a6c73ad5b9f02259702369f1

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