Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abad80af54a1946…

MALICIOUS

PDF

79.2 KB Created: 2021-05-23 00:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 947c13ad9956449768b340b1b2cc9eac SHA-1: 3aa9924e13a47c31dd055b6664b635f78297117f SHA-256: 7abad80af54a1946cd0ae6f69421a9247a40fdea79d9c33831431cd82fd03688
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=what+are+the+examples+of+determiners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452851/normal_6039db31a0487.pdfIn PDF document text
    • https://kerozuvesiduzam.weebly.com/uploads/1/3/4/3/134375161/jugedi_juguwife.pdfIn PDF document text
    • https://fexiganariv.weebly.com/uploads/1/3/0/7/130739648/4399979.pdfIn PDF document text
    • https://torusakewojowep.weebly.com/uploads/1/3/0/8/130814967/07ab6a23c6.pdfIn PDF document text
    • https://zewajala.weebly.com/uploads/1/3/1/3/131398225/xuzetoloj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479237/normal_5fda990276cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_604301fcd85bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_605b84e89e730.pdfIn PDF document text
    • https://bipalokepug.weebly.com/uploads/1/3/4/4/134492575/pozajejipasokapabogu.pdfIn PDF document text
    • https://xatuzagu.weebly.com/uploads/1/3/0/7/130738971/lematufivezigep.pdfIn PDF document text
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/gubevokekagile_limepi.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/7720607d.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/2101914.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/jezikikut-xemal.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/wiruj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383147/normal_5ffdcb3676679.pdfIn PDF document text
    • https://jufikaparilo.weebly.com/uploads/1/3/4/5/134592165/1942830.pdfIn PDF document text
    • https://sulesebu.weebly.com/uploads/1/3/4/6/134634805/visobojobo.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/a37f8782-8799-419e-8a76-6ada2a225da6/caracterizacin_y_organizacin_de_la_pequea_empresa_latinoamericana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa6f6bc-e956-49cd-b4aa-558d53007695/91243417014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b27a147-6176-40ab-8d47-0fb445ca8ed1/55125154782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f752385-ef79-4946-a350-83c29b40b4fc/beats_solo_pro_review_amazon.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_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 5364 bytes
SHA-256: c893b6128e0f3aa9b904ea7938643b13d4401c8554392dbd8078a546c1959044
font_01_sfnt_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 11432 bytes
SHA-256: 5d033938538a80b425f4f5f91d528b462822764544148c810d24c8fa8482afd0