Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2fdc61c4e87c46…

MALICIOUS

PDF

76.2 KB Created: 2021-03-23 08:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e3266ab969293a1461612af24b07a7b9 SHA-1: f7ae694babe55c996c9d9626da3adeafd495ff88 SHA-256: ed2fdc61c4e87c46c50d70d7eb33c5a857a02b09599268d00aec4e4d80c8af02
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/award?keyword=physical+development+in+adolescence+psychology+pdf PDF link annotation
    • http://rewokujow.scienceontheweb.net/96435844444.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/BsgRjiU/fizex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413474/normal_5ffd80f5c7036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_6049bb65af6ed.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/1759584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_605569cdb2850.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/heQ3ihG/kikura.pdfIn PDF document text
    • http://fagilef.getenjoyment.net/33329809908.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/7001617.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_60085a787bbd3.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/novelilenug.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/he04uS6/moto_bmw_cafe_racer_2020.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/adobe_acrobat_pro_edit_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fdae68028d48.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/aa1c2754b15ce.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/30665945693.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/nizopejipegekopagu.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/xenavuxa/bizzle_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/average_salary_of_ethical_hacker_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b56fb8e-8807-4940-b611-12abe8abb61b/eb_games_tom_clancy_rainbow_six_siege.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/phd_thesis_template_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45fc4b7-90a3-4e23-86bf-6b3d20c3a10c/xaroti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7de6a58-ec99-4ef3-8dc2-d254c3450a0f/29545154382.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/43368906942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738a9be4-1fe9-473e-b66a-ed6f5627860f/movesik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1efe34-320e-4d08-9e4f-830ac4abbe9f/how_to_do_balance_chemical_equations.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_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 5636 bytes
SHA-256: d296db3d4c01b36fe7d7161ff996a03286d444534a7aba378310f6454c2e1c61
font_01_sfnt_off0000fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 10724 bytes
SHA-256: 52c2a9ccf931b1143c9451ffbad176d49ba93719eab0f8466b9df4956a24e329