Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca6a70c2bce1e64…

MALICIOUS

PDF

89.9 KB Created: 2021-06-03 18:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7d17145498d6f66ffb18333be7863004 SHA-1: daef831c54bc1ed8c70221bed26cb3e89bba2f64 SHA-256: cca6a70c2bce1e645a1b0674263b60952e4bcbeec3ab06aed5d22f750cfdba60
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous external links embedded within it, likely serving as a lure for phishing or malware distribution. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a large number of external links, with one pointing to a sport live stream apk. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

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://xajibur.ru/123?utm_term=sport+live+stream+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471683/normal_5ff88ab4e5720.pdfIn PDF document text
    • https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/rokew_jokowufevideve.pdfIn PDF document text
    • https://xuvosaxefon.weebly.com/uploads/1/3/4/6/134605895/wenuxepuvedagegemid.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/1210564.pdfIn PDF document text
    • https://voxiranadazezud.weebly.com/uploads/1/3/5/3/135312978/nofukipovarawamuxog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447252/normal_5fe2cdfa5c2da.pdfIn PDF document text
    • https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/kutinukurona.pdfIn PDF document text
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/2119854.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/zudatofelezitulola.pdfIn PDF document text
    • https://naboparukoxe.weebly.com/uploads/1/3/3/9/133997388/ed78886e74fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_60239df6c992f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_6060e78232f7c.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
    • http://fuzobonesujo.pbworks.com/f/gucci_sales_memo_harbour_city.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/80015466018.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144422265/modo_de_produccion_primitiva_caracteristicas.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/how_to_adjust_toro_600_sprinkler_heads.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144539007/6932620698.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/what_are_the_4_major_marine_biomes.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/toro_ss5000_drive_belt_routing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe55c83-4252-4a2d-abc7-5ef306f32dde/58259345922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8afc426-74d2-4a10-a0df-cc0070cdc46c/how_to_make_money_on_gta_5_stocks.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 4872 bytes
SHA-256: 354ee41b8a23719d04d06444314404cf24c61d233bd56259f068817f565fbfc5
font_01_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 1972 bytes
SHA-256: 3940ee66e70f68e2dedbccfe51743ff6dbacb68a576c755f231d598483b98b1f
font_02_sfnt_off000124b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B6 11452 bytes
SHA-256: b9d4c2ad288760adbc650e1a84ff9b49ca14d1167e4cdfb8c3e6186bb66fc086
font_03_sfnt_off00014b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B94 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230