Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bede7bc9edc6db…

MALICIOUS

PDF

84.3 KB Created: 2021-08-24 22:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8d138b66f4bb53714dfb4960e4c452d1 SHA-1: fd2764765283ea5a22938c56747680744cad1cd8 SHA-256: d5bede7bc9edc6dbc4314e9a0c4112a38a1a566debb5f507ee588a9fe1a03d7c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains multiple embedded URLs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests the document is designed to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/fojoxiluvaruvubipox.pdf In PDF document text
    • http://montaze.org/democms/userfiles/file/87207769763.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/ludeko.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/tuwumavazefalonod.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb2a07a4a0---gisufesururezumepifi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d191a898c430ead4f34de1476ae66c87/giteve.pdfIn PDF document text
    • https://area5srl.it/file/voxowafanokopujisoxaposom.pdfIn PDF document text
    • https://mihalex.by/files/files/53103949010.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/26532510310.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160abbe3d483e6---zegazanageju.pdfPDF link annotation
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/rarrqf6rdvhu6jjv85dagd227m/40499390835.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/65093121374.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/rutotumozalubuxuxebumov.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/83609454094.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/tifutizesuvebuniziru.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/41056654590.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/lq45m7545cerov10e4jpt1pkic/77344028691.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/finojofonujivof.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/bavijalesobowafifisesuguv.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb30ea5bce---12018134290.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/63278941622.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5e967832---gufozopewetabavitetubaden.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/35084836331.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/temonewilanabegigaxikig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+change+orientation+of+a+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 10760 bytes
SHA-256: 3a239fe7c70ae150f6c480561ad28a3375514312df084a88d1603633cc4ef5ca
font_02_sfnt_off000115c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C5 17180 bytes
SHA-256: dc0599184676534254a71c9f9544d3d9af954f0855550489707206d740d779dc