Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f6d0de85e97f41…

MALICIOUS

PDF

79.5 KB Created: 2021-05-23 16:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9d88a8cb9fc11a92b179cc0eb1e0c0c2 SHA-1: e852ea3c628d7d7af50dc6c605695738c057bc8c SHA-256: 93f6d0de85e97f4109f47b4fe1f56c7a135bc4dd36c99248a40e9b34abd2c5b3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=sin+senos+si+hay+paraiso+season+2+episode+18 PDF link annotation
    • https://nawamawivawugu.weebly.com/uploads/1/3/1/3/131398148/f2bc09c0.pdfIn PDF document text
    • https://tivowigelatel.weebly.com/uploads/1/3/4/4/134495783/kurinapomelujodevit.pdfIn PDF document text
    • https://zifalopo.weebly.com/uploads/1/3/1/3/131379769/tipiger_visunilanav_mojag_nunikosiv.pdfIn PDF document text
    • https://nirixebuwema.weebly.com/uploads/1/3/5/9/135990662/vazoxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_60502501abed2.pdfIn PDF document text
    • https://vodivabowadabi.weebly.com/uploads/1/3/4/8/134877230/mevufudoti_nivuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_6007e2fa03c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_606cc413da4b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_60394c1a0fbe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_601b2a3f490ce.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/lubunubekofuv_zoremiwowe_nujum.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/mexirupere-fifeziloniluf-detoruwebaraf.pdfIn PDF document text
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/1566992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393751/normal_5fcf3c2b6fa91.pdfIn PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/d5cdd6c.pdfIn PDF document text
    • https://pabaxovazat.weebly.com/uploads/1/3/4/3/134323574/xukun_miwidapug_reguwojazi.pdfIn PDF document text
    • https://gamowova.weebly.com/uploads/1/3/4/8/134881319/leladuvonunomev-fogenadig-sefodulaxuta-jinopiwelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e3c4e0-fe91-44bc-bca0-89eb0298521c/99933144324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d48f558-0a9c-4018-adaa-6a8ced5f5dc9/24576572410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cd3839-20ae-47db-bc59-ed0723e8a2a7/37750906551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb49871-1631-4acb-8994-562de7aa98c5/dell_inspiron_3847_cpu_upgrade.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_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 5600 bytes
SHA-256: 7ea138d90f66aa9a97b3ce7708fae9d3a764626a965ce13fca4043570f2ef09a
font_01_sfnt_off00010947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 11476 bytes
SHA-256: 5e201d221ab0b4033f10805d4070e81b3338cc5c88d2da087e93e7275c94ed92