Malicious PDF — malware analysis report

Static analysis result for SHA-256 00829e22301a0c39…

MALICIOUS

PDF

113.3 KB Created: 2021-07-02 12:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bc6db4e6b748f0e5b2302868770f10c2 SHA-1: 69eb671d69ca8002c57eb3c9c19b41cad10b8064 SHA-256: 00829e22301a0c3996c55250955a0aa0eb9824f8419405782fc369df75f2df2f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • 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://em-mould.com/ckfinder/userfiles/files/worukusufegugufirifixuxo.pdf In PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16086004566772---kamojipasumotabozof.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/jildefe1tm7oagknfi7thnlruf/fumufusoxetuzurugodupoju.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/66640216194.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e6ce68f612dfe821485f4d4cbaab023/tijoneradukabetu.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/manidok.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074138754018---pupuzubusufokomusepa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6428fea46e---22756284037.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7e9256756---farilewalamulizorepike.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/8a3knm7d908jh719ma58b30g70/28971150733.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/xaruda.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/reram.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a649eb72c---44472902387.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/22454118129.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/5074483545.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c38ddc26f1---vukixuraxezekimakozev.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/pusopijadufazuduzoje.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/bevavopugow.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/9339810803.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/aa06b808249159466658a390d3496124/39381668383.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bda459cf8f0---nemosizovu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/joxovexatugovinunedaz.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5e3c1d341104c8ad7f09a38b56c0c721/13019072813.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/ganalukujilugik.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d8b5ae3b65631b0ab41ec4a2a80bc8e3/56900296573.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=schultz+theory+of+traditional+agriculturePDF 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_off00015878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15878 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001708f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708F 10936 bytes
SHA-256: cd371a6bc7ed94921508947182ab55c09c8e0a93613b4979f10488ad46fee550
font_02_sfnt_off000189ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189BA 17800 bytes
SHA-256: 3b7faaacf2ad022a2288d43c6ea7f9e6ecb88a84ef1b776d5d11ae427921f84f