Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ec07cff6fce3cb…

MALICIOUS

PDF

62.3 KB Created: 2020-11-18 08:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9706328779f5e1fcdeeae57d66e01f84 SHA-1: 11e6f7fe3b41958fc12fdd1954721b9261023471 SHA-256: 23ec07cff6fce3cbac76885dd7f6fccc46ee15c2810a61308a3b6f8b9b98345e
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 phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is trafffe.ru, which likely serves as a landing page for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafffe.ru/strik?utm_term=palabras+con+illo+illa PDF link annotation
    • https://zixamagexiwu.weebly.com/uploads/1/3/4/0/134012381/3297334.pdfIn PDF document text
    • https://polipofixino.weebly.com/uploads/1/3/4/5/134598506/128966.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/4591516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5fa66b566c334.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/64526.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/3e0ceeff9a.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/xumemakebufama-pekabirafumuko-voxonudika.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/de28024b.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/29b83dcf-29bf-498d-9a01-c937f6a1e7fa/40091692126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0318cc8-ffeb-4458-a919-cde63cfa1e25/favodobezozomokalulerun.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/xidaker.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/a_n_m_long_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/resepojinediso.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/bcom_ptu_syllabus.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_off0000ad71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD71 4524 bytes
SHA-256: 6979f4851acf17d647c895a9a48cf8bd6c2bf637a653b426ec0e180a4b56c218
font_01_sfnt_off0000bcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB5 10116 bytes
SHA-256: e5b802c8459146c12ad811968a369c8f7c3590ffea93bbc3acdea61e60f6bd75
font_02_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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