Malicious PDF — malware analysis report

Static analysis result for SHA-256 7727035b63ee7942…

MALICIOUS

PDF

81.2 KB Created: 2021-05-28 05:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5aa4fbcbdf6703310041d9b5f9fed00d SHA-1: 247111d991570a17e2ea2b6ea9a5c2fb3c78d445 SHA-256: 7727035b63ee794214307ade21fe75df72832a8a1202c7e883dfc8508f21da36
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The primary URL points to a site that appears to be a lure for downloading a PDF, likely a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://kuzutuzo.ru/strik?utm_term=vendedores+perros+robert+kiyosaki+pdf+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482027/normal_604e947b575cc.pdfIn PDF document text
    • https://vojesegavosoza.weebly.com/uploads/1/3/0/8/130813146/8792054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_606ae5613b8f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_603ab3d7bb9ac.pdfIn PDF document text
    • https://zesujejiviwi.weebly.com/uploads/1/3/4/7/134729849/xiruwaderijufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411479/normal_5fef12748b95f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_602d8c13a5712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417405/normal_5fe57ba788ae2.pdfIn PDF document text
    • https://lovevupadu.weebly.com/uploads/1/3/5/3/135328586/mifidotenawunol.pdfIn PDF document text
    • https://kawuwulaf.weebly.com/uploads/1/3/3/9/133987507/1432620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481819/normal_6003ecaabd6d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_602be7b7bf87b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485309/normal_6065c7a38ce11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_6033a12f2b061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6044532ca1611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fd1be324835d.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/ec6afab8-894e-4a00-b653-88d9c0fb7d88/exercicios_resolvidos_de_vetores_e_matrizes_em_linguagem_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17838a57-9bc3-4ad0-80c4-9e3b7ba0108d/90679570463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24ef6b7-6415-4ee3-a888-348b9b7dd0e6/adding_and_subtracting_fractions_with_like_denominators_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b383232-c1db-4bc9-85ab-af94cc0e800f/55144030452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecec9354-8224-468b-88b9-dbea41014467/lakosoputimezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eeed662-ec44-4ecd-b211-ebeab0d3de29/48422607909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba6e5e5-76c0-4677-9b9b-e911a52b2c07/17732323877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3256082-135f-4ca4-b5c9-46c4466f78e4/free_tiktok_fans_no_human_verification_or_downloading_apps_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e5c49e2-ee74-4642-98c1-90784a5fca86/tarapoxeririwodikibiba.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_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 5236 bytes
SHA-256: ce1cffd405d0b0832f09298a91f907be47dd0d8ea279d7fa9e103b452b214195
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 12420 bytes
SHA-256: 5cbeaed0869cc0d0da7cbbc8f24ab9255b2cf12558d3a543ebe99e58b69047a3
font_02_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378