Malicious PDF — malware analysis report

Static analysis result for SHA-256 8470b66066cf2fb7…

MALICIOUS

PDF

72.0 KB Created: 2020-11-20 21:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c2bdd4c667d93a307b88c0d1c3e3f21 SHA-1: e27c84f8a93dc931871c72264df4e9e7741496f1 SHA-256: 8470b66066cf2fb7d72939b9642810ac58b0296d93e7753cf9bb686740be465b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary URL, 'https://trafffe.ru/123?utm_term=volume+of+solid+semicircle', suggests a potential SEO manipulation or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=volume+of+solid+semicircle PDF link annotation
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/78837abf1e77576.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/zalevenodekaxek_sifiwaxev.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/remebulafameju-jonilox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5f92cc01c2869.pdfIn PDF document text
    • https://penegekefifix.weebly.com/uploads/1/3/4/5/134586424/worikawuxu_nuwizolod.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/433453.pdfIn PDF document text
    • https://toriradusug.weebly.com/uploads/1/3/4/7/134744904/f51bac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5fb4e57c602e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5fa6eda14b4f1.pdfIn PDF document text
    • https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/203078.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5f8901af03323.pdfIn PDF document text
    • https://mimusazufuxor.weebly.com/uploads/1/3/4/5/134500801/lejepoz-tijitezarid-dofilaj.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/lijopavexanuse/babinet_compensator.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/grim_dawn_in_memory_of_gogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4286bf48-14fb-4051-8b94-506b65fc9ed6/contrato_de_asociacion_civil.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_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 4920 bytes
SHA-256: 13a6273e60a96a3dc1ac86029ccc2b5a90206c6b38c8f439a908fb92fd329161
font_01_sfnt_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 11632 bytes
SHA-256: f3c3ebfa1e59e9e58b0949b565063c3052e528dfb1601fce5d300e1b558c91d5

Open this report in the interactive analyzer, or submit your own file for analysis.