Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18fbf214dc6f95e…

MALICIOUS

PDF

81.3 KB Created: 2021-06-10 20:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 93b034d1147db5f81619a81069519c54 SHA-1: b26adf9b4abc1fbb0b5a324e9b08f96021926a0a SHA-256: d18fbf214dc6f95ec96965adaeb685445634ada73e206a85cd3bcf0be11586be
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://allytemp.ru/pbw?utm_term=minecraft+duplication+hack+client', which is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests the document is designed to host links on disposable domains, reinforcing the phishing or scam nature of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://allytemp.ru/pbw?utm_term=minecraft+duplication+hack+client PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ff9d4298d2ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5fef1abd32a93.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4490128/normal_60b2e3d2306c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_6039a34695f8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_5fd76e3ca26a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_60273094a94a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_6011e9ba30244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fd643ef4ab74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1ebb4759-45b7-49ab-8c76-07a90bdbfb1b/comment_convertir_un_fichier_en_excel_gratuitement.pdfIn PDF document text
    • http://sonubugu.pbworks.com/w/file/fetch/144896364/5_years_java_interview_questions.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/zegirupifezotekaponovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f436f2dc-7874-4050-a64c-854211df9e80/how_to_solve_a_4x4_rubiks_cube_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06474c80-e746-4f46-9f18-a05026c940f5/husky_26_gallon_air_compressor_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4377aaa-4329-4cb2-807e-da72506836bb/self_confidence_meaning_in_marathi.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/convertir_coordenadas_geograficas_utm_a_grados_minutos_y_segundos.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144585048/tebevoxorafuvunozixu.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144631485/how_to_write_a_business_plan_for_real_estate_investors.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/cartoon_guide_to_statistics_free_download.pdfIn PDF document text
    • http://lulatigono.pbworks.com/w/file/fetch/144772659/what_is_an_advantage_of_the_standardization_strategy.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144527211/75116634487.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/towegizabomativozoposox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5016 bytes
SHA-256: 133c04de3c1121e052ee79eff31acee6f15b0362ca0decafb928a168346d5fba
font_01_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 11676 bytes
SHA-256: 0c854b2d0baf66d84fc3f6e6500cf9ebeb52f26d63e67788c9b8e38b1d3e81e5
font_02_sfnt_off000129f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176