Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fd2881b29e67e9…

MALICIOUS

PDF

75.5 KB Created: 2021-02-25 12:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 341e55ec6b8ce6025fd063cb7418b303 SHA-1: fd137b5638b0e433ca8fc5154fcfc1a9cf397b59 SHA-256: b0fd2881b29e67e92c76f3842ca8eaa5eac0352c9b96f8459a4e6cb77977537e
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external URLs pointing to disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=matthew+hussey+camila+cabello+split PDF link annotation
    • https://revixapega.weebly.com/uploads/1/3/4/6/134619396/a696172b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_6010603940432.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/97ce3ff6c.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/jehhKpK/lapanuforeveruni.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/hj7hMhd/fobijonopegovafagorajowo.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/jezugadot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_602d351bb8bec.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/bezojajotanufafafesibu.pdfIn PDF document text
    • https://lekibuwowobaveg.weebly.com/uploads/1/3/5/2/135295955/8509381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5ff25c16a6b4e.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/who_holds_the_record_for_peoples_sexiest_man.pdfIn PDF document text
    • http://soul-felt.com/shingeki_kyojin_chuugakkou_legendadokbpco.pdfIn PDF document text
    • https://xulomonixibeneg.weebly.com/uploads/1/3/1/4/131455416/vuvepose_nutuk_mekavajetekibon.pdfIn PDF document text
    • https://pomadiwu.weebly.com/uploads/1/3/5/3/135313662/tubemuvedewa-muwomenuwulus-nixezoxiboli-bokikizejovij.pdfIn PDF document text
    • http://tegor.xyz/943046252014imbk.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/masuwibuzupadumanuf.pdfIn PDF document text
    • http://pumba.fun/blastall_output_format47lou.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd6449d168e9.pdfIn PDF document text
    • http://stavki-na-sport.site/90023465298e3uf6.pdfIn PDF document text
    • https://simomoluxaruto.weebly.com/uploads/1/3/4/8/134859410/5830322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/36347856363.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_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 5416 bytes
SHA-256: 72f81228acdfd97e5d9d0c824c560e0a8482584cfb92954447147fd8b855fb0b
font_01_sfnt_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 10692 bytes
SHA-256: 61421b81271482475bb1042d5fa729b06fefe5b366d388fd797f04fd4c5e0687