Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf60415f8cc765c…

MALICIOUS

PDF

75.1 KB Created: 2021-04-19 14:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5cf25889cb9b2c79913485b18b681eee SHA-1: da1c4886110e454f21f008d1787292cf0bd257ae SHA-256: ccf60415f8cc765cb0cbdc78f3a8b2a021dab5422480b71e77ff427beed4fc12
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 hosting, suggesting a link farm or SEO spam operation. One URL, 'https://baarspo.ru/strik?utm_term=fitbit+versa+lite+smartwatch+functions', is particularly suspicious and likely leads to malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=fitbit+versa+lite+smartwatch+functions PDF link annotation
    • https://lemamoramu.weebly.com/uploads/1/3/5/3/135348447/rifufe_lenumarunupot_nedowit.pdfIn PDF document text
    • https://gapuromediwav.weebly.com/uploads/1/3/0/8/130814643/158e6a330.pdfIn PDF document text
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/04a8eccb3f4f9.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/985f41c17dea9e.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/bipelarexajasa.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/1fe390d1.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/9009731.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/650379.pdfIn PDF document text
    • https://pizopivawot.weebly.com/uploads/1/3/5/3/135347149/gaxamot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/char-broil_classic_280_2-burner_gas_grill_parts.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/fashion_marketing_and_management_online_degree.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/68474239908.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_e67480f88cb945ecae97acc90cb6bcf2.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_2a4085cdba2e413ebea0cbc03a880c70.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_77262ffeac90409891f743f324220566.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/001c4e9c-4555-4c5b-86ec-73a62598d868/gimudufaxabum.pdfIn PDF document text
    • http://noluxum.epizy.com/oxford_dictionary_of_biology_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133fd072-e7b0-4335-bdcb-69ed989c14d1/rawusovatulixubigubirexo.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/tuwawoz.pdfIn PDF document text
    • http://naxisimi.epizy.com/qualitative_descriptive_methods_in_health_science_research.pdfIn PDF document text
    • http://salulasalanegox.rf.gd/57761674153.pdfIn PDF document text
    • http://renepipelusibav.rf.gd/axis_camera_management_software_manual.pdfIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_4cfc75ed2653489991b53590f8f619e9.pdf?index=trueIn 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_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 5368 bytes
SHA-256: 8b561b5399d270082af872bace9de2ffb5dfa90429b5ec5c41378b2df1320da1
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 10364 bytes
SHA-256: 4f1ffa69058d46766b9b87aee2dc6c313864dce72de8fc7363119beaaf472762