Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcb77206a1373d1…

MALICIOUS

PDF

73.8 KB Created: 2021-02-21 05:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2dd32ca76c15c1a5c7edac92e73456ac SHA-1: 564526d32ac19ba0fd10931bacd013c2d321b5c0 SHA-256: 6dcb77206a1373d126238879f932dae8d95438d29cbf4159e610dd9e5c52b770
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a mass of external links, identified as a link farm on disposable hosting, with a high ML classifier score and ClamAV detection indicating malicious intent. The primary purpose appears to be directing users to potentially malicious or phishing websites, leveraging the document as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=art+in+the+age+of+mechanical+reproduction+walter+benjamin PDF link annotation
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/popumusenixusovoma.pdfIn PDF document text
    • https://silatasetexa.weebly.com/uploads/1/3/1/6/131637876/verevonazutixev.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/disavedizunamu.pdfIn PDF document text
    • http://osummer.space/26540069657mc3t1.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/4721999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fdac61370e58.pdfIn PDF document text
    • https://telemoradez.weebly.com/uploads/1/3/1/0/131069753/5208982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447084/normal_601dac13636e7.pdfIn PDF document text
    • https://beserozufem.weebly.com/uploads/1/3/4/8/134864657/4b6b9.pdfIn PDF document text
    • http://photoforce.ru/certificado_antecedentes_judiciales_policiayp21l.pdfIn PDF document text
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/nowemezej-sowifovuwisiku-xuxag-fogunulaguliluk.pdfIn PDF document text
    • http://creampiepow.club/wonuvotapimupamexeru25839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449184/normal_5fc5cefc40fde.pdfIn PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/1ca63940552.pdfIn PDF document text
    • http://tiktokfrance.fun/characteristics_of_information_communication_technologyd8bf0.pdfIn PDF document text
    • https://vifojozajo.weebly.com/uploads/1/3/1/4/131454549/8341648.pdfIn PDF document text
    • http://lamovingcompany.com/8438211993305007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501204/normal_6006b00b8e7d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozekav.epizy.com/39322932760.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_off0000e3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D8 5688 bytes
SHA-256: 5098a632ad51da82df3dcb06df20298b73acb941f91c3b1275080d490d1fbe87
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 10108 bytes
SHA-256: 3e8f4765c5817fc391ef61b86b7b7d597f1f5681c3afd6bf3d13176f777720ff

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