Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaa79645fe9e17a…

MALICIOUS

PDF

89.3 KB Created: 2021-09-06 19:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b25a5b2abb47e03ce538dd31b086adab SHA-1: d23392ff4a50802d993e16c1e983a4c756200623 SHA-256: eeaa79645fe9e17a41423ee9e91574f42258ea8162f53cbbe9338faad3e12af3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is used as a link farm on disposable hosting, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd2725536---denon.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/f7b0931414f6a51df7550d02309218c0/89465290221.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160824706a85b7---29398031105.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/86585627006.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/xoviselasabobaxijido.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/sositikowirete.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/46896202816.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c3v0o3441qe9ptn3iimj4piks1/dogekotujizekonu.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///393545642.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/96100682710.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/bojuweme.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607750893ba99---12951889459.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8add948ca---53366587297.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608154120b557---68583578518.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/010610025819.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecc223829---netuneli.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9f124a44b---92620790063.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/53485550656.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609642e1990cc---figovelubowifopugoji.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/7495325643.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/42300004087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=odia+rudhi+and+their+meaning+in+odia+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_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 16772 bytes
SHA-256: 069ac7fe6edc05533c44d7ef9948e4667cc04d726ae815a200ad48e2fdae2a53
font_01_sfnt_off000126b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECB 10856 bytes
SHA-256: debffa8c3b85c4bb85a8d8501e31e5f54b89aad0b34a5f242ddf6fd4207310d5

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