Malicious PDF — malware analysis report

Static analysis result for SHA-256 4002c1f6e9e09b8c…

MALICIOUS

PDF

90.2 KB Created: 2021-08-13 07:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dbf5c5821fe38e7b06b13898124c7f9d SHA-1: 338f62113de2633cb12c1d0cc704149a7d357868 SHA-256: 4002c1f6e9e09b8cd87a74f64ed9ad4b6c221df9079a345e34657df7cee3d244
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous URLs, many of which point to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://catamma.ru/uplcv?utm_term=combining+supply+and+demand+worksheet+answer+key PDF link annotation
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc1a5fc1b---70260317676.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0d312f8e4---bovexajoletunowokezamiro.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/fevakoxadulanofa.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/gejirumedidopesogevakab.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/1223078507.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091da1450d9f---tajevaseni.pdfIn PDF document text
    • http://business-baltic.com/myfiles/dok/nitujiraka.pdfIn PDF document text
    • http://dges.in/userfiles/file/8475964576.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/31964536325.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/sagetamarufutinigu.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/95385490809.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608556292ae5f---16754443540.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/pinevipegezebul.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/rasepubupebidem.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/74299234037.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/jefowitarekomalatirakig.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/jadituwotegunagilulusi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tqgh5pd7h8ftjs1ejbrisqt317/dexujotepinalus.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f7efb3be4d32f147bf2f3160325bd873/nufobavumelobop.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/92182128287.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/85619751294.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/18641446792.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://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_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D4 11404 bytes
SHA-256: cf09311205ef3324432582c33e731f3913bcacff351368159a7bec23f71bb81d
font_02_sfnt_off00012e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 17096 bytes
SHA-256: 71342875f0372906ecea413f1d61f2e898bda85b6f9ea95be8810215f06f3153

Open this report in the interactive analyzer, or submit your own file for analysis.