Malicious PDF — malware analysis report

Static analysis result for SHA-256 346ba17bb2550f68…

MALICIOUS

PDF

77.3 KB Created: 2021-09-14 13:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bcc69ea8d7727680547a38c227fcc151 SHA-1: 0f01babd94f757526c7eae86995d43ae88903b61 SHA-256: 346ba17bb2550f68c974e0cae90d3265163388ccb5b029319861be466ad1b55f
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 CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://svetplus.com/userfiles/files/4028394759.pdf In PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328b7bea35b---mibizadumip.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/8203602222.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/waxabisemejivikawajesibu.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109061257492607.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/31140146259.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/21813238050.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcca669094---32564236474.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/jenodin.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/wewabemulirudux.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/2481283408.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/82656949005.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/15897113892.pdfIn PDF document text
    • http://czyxchem.com/upload/files/70341725535.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/solugoxosukafivedexu.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/kupuwumuripef.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9e45564f6---gasewabotivabunidaviwe.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/6614739949.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/niwiziwukunewodavije.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/sidegigigifapojifupaduwav.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/peseduno.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/11545018642.pdfIn PDF document text
    • https://akconta.com/uploads/files/kogadar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=my+talking+tom+and+friends+apkPDF 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_off0000c391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC391 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 11040 bytes
SHA-256: 9ba3bd8a8fe8c94466bd28fb7e1e3769ab988010e0d29fc7a0494a4256cf39a6
font_02_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 19692 bytes
SHA-256: cf46f8e7aa6e82965a98c01cbe6f0dd9e23ffac05c2a52dc76e7f656f9825308