Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e0f804c4054435…

MALICIOUS

PDF

76.7 KB Created: 2021-03-17 19:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fd7126914b35bf3d5bdc4f74e8721596 SHA-1: 03435a99628c720a3981346c9af731b91a7925ff SHA-256: 27e0f804c4054435cfc43d0359122890a64b0980a2c1fe994a4562ac55a53fdd
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 document contains a mass of external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites like 'dugedepap.ru'. The presence of embedded JavaScript, though not fully detailed, is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=how+to+make+10+brine+solution PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447888/normal_5ffb8b7f3e1f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380211/normal_60010923d0b06.pdfIn PDF document text
    • http://mazipuvaxa.mywebcommunity.org/46220556508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_60249916c0b8c.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/94f3ea22d47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0870a4258d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390074/normal_5fecf96c9db79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_6017689d388ec.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/bodebi.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/dutumi_birazawogotezo.pdfIn PDF document text
    • http://kagivumuro.iblogger.org/tech_newsletter_template_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_5060e80e38794043aabdf562f598b879.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_4836ca3238c44dd9aa3dafb552ec6661.pdf?index=trueIn PDF document text
    • https://e474413f-ff6d-4b46-a00c-d4c33541206b.filesusr.com/ugd/ddecc0_e2a15e8740f445169c97c4429c418ccb.pdf?index=trueIn PDF document text
    • http://fuvarijes.atwebpages.com/23617588741.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_e1dfc77dbabf46fcadfff888eec33dfe.pdf?index=trueIn PDF document text
    • http://sisubupofi.epizy.com/afmc_admission_result_2020_20.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_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 5284 bytes
SHA-256: a46273e06b8b1dc80b055b3295788a56856646b0140461136b349ed771333b2f
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 11088 bytes
SHA-256: 96753f90604064ecfd7daeac9fcdd85e25f72091b1efbfdb78c99ffae126490f

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