Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c602358f2736a6…

MALICIOUS

PDF

86.3 KB Created: 2021-09-04 03:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cde10a51c97f0d4043c4cd83554ad9ef SHA-1: dd43e0f29e4b1a5cd9916da7680e9f476b40de20 SHA-256: 09c602358f2736a6fadf5687806c644fab7b366f95038ce506e62eb6c182a40f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware downloads. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=citroen+c5+aircross+cena+pdf PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/kunurafitosutepodig.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/vazan.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/57380053694.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/52036741885.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6ba5d3909---42200600503.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/46884202383.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/m9q7nttrmor7ie46ahfa5s5aq1/fuzibowovitagalidat.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c417429da5f48e1f67fb377c3fad200b/55353595337.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/55657884890.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8502089461---86618834172.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4df52f24a---73588096357.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/pemututoverowuxewaruda.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/mepurogupegaremalaxebu.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8b56b391d---rodanizirowo.pdfIn PDF document text
    • https://mmszke.hu/files/file/35062625484.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/ketowexom.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210831_9D1AA1FC6B761886.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/38541252585.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4fa7a385b181d3738f3ebf74b15fd5d8/zekusa.pdfIn PDF document text
    • http://nuestrasenoranm.org/clients/8/88/88a18899c67a61641ca1f7d027daa919/File/labuwibotifuluxirujas.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/vemapoberoxiwedalobalil.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bc66ee43d---30706583320.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_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 10732 bytes
SHA-256: be0788c66d585a519c917116b9d00e9bba8d05480b13dc576ef9770a6f589274
font_01_sfnt_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 20640 bytes
SHA-256: d8b87dddf8f7d7401bf379ba52b7893928773c8b8086f8ccb3a435cdfafcbd2e
font_02_sfnt_off0001337d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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