Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67804ecf8cf83b7…

MALICIOUS

PDF

78.0 KB Created: 2021-04-18 06:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 79c135c9e29b51ae60aec286beed307a SHA-1: 263187d4218f2cae3563ffcadb54fbb1d91ed774 SHA-256: f67804ecf8cf83b780d5334e8fed9b2050ee41734135ef63f18de22010aa3906
156 Risk Score

Malware Insights

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

The PDF contains a link farm and a primary malicious URL, suggesting it's designed to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=used+snapper+mowers+for+sale+near+me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fe018cd1ee1e.pdfIn PDF document text
    • https://kavusataru.weebly.com/uploads/1/3/5/3/135314949/c87908b2.pdfIn PDF document text
    • https://zakifamo.weebly.com/uploads/1/3/5/3/135318304/288a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60535fae22ead.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5ff3e258ce794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_605f7a50bf822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_602377408e412.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/xujitezu/best_philosophy_books_everyone_should_read.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/full_album_bts_ly_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bab85e4-1d23-4e2c-a2af-d317f8331e19/does_kenwood_kdc-hd262u_have_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/around_the_world_in_80_days_full_movie_in_tamil_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be55549-3843-43d7-9bc6-d8f4be3e8c3d/22226550500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e0d320-93c9-4c98-a72e-61bd2cc99ecc/vishnu_sahasranama_names_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ce5a8e-0066-431e-8f44-3a9eef1308c7/pit_bike_parts_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcf118c-1a89-4e52-9484-72ec6c202de2/monster_girl_doctor_episode_9_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/86215823700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943b6d58-0010-4d92-abde-5be86b2ecda7/jezekokasigililajid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5fcf26-eb48-436c-ae13-7fd34e36df3e/58741407825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0634adf6-ba41-4787-a9b5-6db0fa8073e6/los_mejores_libros_de_economia_liberal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387354d5-3ae5-4ab2-8e74-c001f861374d/kowoliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f467dcc-0388-4379-9fcc-4f62d375ad9e/adding_fractions_worksheets_5th_grade.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_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 5268 bytes
SHA-256: a40ee1c5e1f02f7768a3a50fc9aee72008024b69111ec5141f1e9d2f5971d3b7
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 10816 bytes
SHA-256: 0df27814fbb95e392aaa85b9a17cb67c93c241e1a6e2df79c1ea496fff4c677d