Malicious PDF — malware analysis report

Static analysis result for SHA-256 675415377badb407…

MALICIOUS

PDF

95.8 KB Created: 2021-03-22 10:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: eaa4318ffe5ff47e218395ae2ddb6f4e SHA-1: d0951f1ed640020f4274f98858543cb531e8922c SHA-256: 675415377badb4078baf1d52a39cb647193e5d9a55b5a92b7ee4905fbc7e1172
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded external links, a technique often used for SEO spam or to direct users to phishing sites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest an attempt to redirect the user to malicious content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=the+vedanta+way+to+peace+and+happiness+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe227499ec78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fe55e2169bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_6021bb66aeaf6.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/american_pie_2_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5fcdc33ec97d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_5ff2aa8ae206a.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/begijufadi/livros_para_aprender_ingles_gratis.pdfIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_3cbc59c166294a16a202f7768765ee1b.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_a3630e0cd0e4434cad31a7f2a86b9729.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/97143187104.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_ee7dde2b3053496eb89f2daa4bfd8fed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/what_are_the_aims_of_sentencing.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/8272004577.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/86746502078.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/destiny_2_black_armoury_guide.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_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 5320 bytes
SHA-256: cf8259b2b477b6185be1b3327794d525cce32e85485090f00cde83bdf919e8e4
font_01_sfnt_off0001496d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1496D 11872 bytes
SHA-256: 76a620dfa4f263fa62f91d162a2eea3e08fd30a950b26842ef933fcd27ec98ea

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