Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f31f9206627621…

MALICIOUS

PDF

75.5 KB Created: 2020-11-18 06:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ff96ac4fca8b2f92a673a0c6e89bd2d3 SHA-1: 606e02aeb775b92e970f5c2f7ecaaf5f7aa7ba69 SHA-256: e2f31f920662762102b9f0a6129e9aa8aaa0058df1f49b5cfab43676fd0ecf1d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. One URL, 'https://traffking.ru/strik?utm_term=distancia+minima+entre+pilares', is directly embedded, and numerous other PDF files are linked, likely to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffking.ru/strik?utm_term=distancia+minima+entre+pilares PDF link annotation
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/tosidarade.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/9395955.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/xiloxaf_senor_bowifov.pdfIn PDF document text
    • https://zanorima.weebly.com/uploads/1/3/4/6/134624551/2611618.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/185478c.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/forofogetan.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/gokigugekeje_fufedesu_vupukopog_jusasekuk.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/nojozan.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/3091b94c61a9ddb.pdfIn PDF document text
    • https://rozonamofo.weebly.com/uploads/1/3/4/7/134751518/guvuvo-wemezedu-fegulaf.pdfIn PDF document text
    • https://levibezime.weebly.com/uploads/1/3/3/9/133986639/rutazimi_revipamerunigef.pdfIn PDF document text
    • https://vamolitewule.weebly.com/uploads/1/3/4/6/134670516/teredow.pdfIn PDF document text
    • https://xijuxesipokufi.weebly.com/uploads/1/3/4/0/134042605/wobiwuvapedadax.pdfIn PDF document text
    • https://zaruteso.weebly.com/uploads/1/3/4/7/134716260/bafukegulid.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/fusox-tesovifuka.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/wovitiku/home_home_on_the_biome_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/13501888079.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_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 5076 bytes
SHA-256: c5f0be1fb045d9a26762b55cdc7e214e19dc32bfe100cffda91ddef850d94702
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 11020 bytes
SHA-256: b4ac921dbc2d9d27127dbf0abde1ddade1e284f07e32960faff7d240e34b7d7f

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