Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf7f0405bbbcb50…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 03:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0069ae5cdf8c220a9c5f1a00f124a7e1 SHA-1: ba51ba5789ec09bbef3afc7971f0053f551e7007 SHA-256: bdf7f0405bbbcb50898c20fd9442992c900818f90052035e2750b05ebff4e74c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or scamming by directing users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/wix?keyword=madden+mobile+hacks+for+coins PDF link annotation
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/9035344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447251/normal_5fe237b537054.pdfIn PDF document text
    • http://relax35.ru/famafekemrder.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ffdcdce03fa5.pdfIn PDF document text
    • http://mattelipsticks.site/pimasoruxenokoxegus3ljrx.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/trigonometric_identities_proving_exercisesnsrzw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fe5da3c99af0.pdfIn PDF document text
    • https://mufusudakewita.weebly.com/uploads/1/3/2/6/132681672/de285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_6033dad7a961e.pdfIn PDF document text
    • http://mmuuue.space/jodha_akbar_tamil_hd_videoir0m1.pdfIn PDF document text
    • https://refodalisa.weebly.com/uploads/1/3/4/4/134437853/b82fe1695e3.pdfIn PDF document text
    • https://zepiwifolu.weebly.com/uploads/1/3/5/9/135965208/bec29.pdfIn PDF document text
    • http://wevesapawuzu.22web.org/salado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_5ff6d62b940ba.pdfIn PDF document text
    • http://muwabiva.iblogger.org/simuleg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafevuzadolax.epizy.com/bohemian_rhapsody_piano_original.pdfIn PDF document text
    • https://4c38db24-2924-4bf2-81c9-04860d987a69.filesusr.com/ugd/a68d8f_e84028b7878b48f691a7bd6b3afd82a8.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_6ac3ceeca99c404a82f205a7f1b8ca07.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_65c981f5e4d542bc84bc92b013d2a98b.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_76688784ed1d417da70054f26bce48f2.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_aa0ea01ba3ed465dad4a021a445c8f56.pdf?index=trueIn PDF document text
    • http://gesasodalunaka.epizy.com/platform_brogues_uk.pdfIn PDF document text
    • http://tafaredos.rf.gd/2391091496.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_cf3c2a1cb21f436c8298d3f0fbd00f31.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_b52a64c751e842b5bea39c6eb2a1c060.pdf?index=trueIn 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_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 5468 bytes
SHA-256: d5ef5d8700bce95f89987789f6997b8fd57bca7beaa31e39210a90ad105743af
font_01_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 11072 bytes
SHA-256: 1dd0c837090d455b7c9785665e43d9a32b0bc71755c47bed63b223e567671040