Malicious PDF — malware analysis report

Static analysis result for SHA-256 60681056e33f9530…

MALICIOUS

PDF

70.2 KB Created: 2021-05-02 15:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb8e5471389aaa7af07747443c14a359 SHA-1: a81efd2c175b69b0c83ba5be1b26c4db7f01d14e SHA-256: 60681056e33f95309272f56819fbfe957bdabf9f15d70df340e0c6641d6ea2b5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, https://xezojetit.ru/strik, suggests a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=which+fantastic+beasts+movie+comes+first
    • https://relitaju.weebly.com/uploads/1/3/4/8/134888942/xanotulil-gizew.pdf
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/5084040.pdf
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/4433695.pdf
    • https://cdn-cms.f-static.net/uploads/4377120/normal_601841faa39ef.pdf
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/2e988.pdf
    • https://cdn-cms.f-static.net/uploads/4465691/normal_6010aa6180230.pdf
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/9804840.pdf
    • https://static.s123-cdn-static.com/uploads/4381297/normal_5fcc9efac87d5.pdf
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/galubap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a4078cf6-8fa3-420b-ab61-258487076e43.filesusr.com/ugd/a3907e_ce56ae0ba9a342b286aae95e2ca584fa.pdf?index=true
    • http://mekavebij.epizy.com/65545857588.pdf
    • http://vofiwevo.epizy.com/colorado_statutory_warranty_deed_form.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_c90ccc9616ad40c9ae98e8e3f40149eb.pdf?index=true
    • http://texazufuvo.rf.gd/nivaxuvovuzadumebixivo.pdf
    • http://xunawikavamenu.epizy.com/experiment_linear_motion_lab_report_conclusion.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d50a.bin
cf5b15a594b371ce6ea27f8e1fcbb0c3acd78a805804bc9d51f69808a187b029
pdf-font-stream PDF embedded font (sfnt) at offset 0xD50A 5300 bytes
font_01_sfnt_off0000e701.bin
c3705c49b2a7adcfeb2f29f88f15d88b49b2005af2230b8312ed4530aca4b195
pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 10792 bytes