Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6ee324acecc8ee…

MALICIOUS

PDF

88.8 KB Created: 2021-07-18 03:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4690b9ecdd45b420e3c68e1ee3dcd8e5 SHA-1: 72a33101e3e278fa3e2de246c89da3dec1de71ae SHA-256: cd6ee324acecc8ee8a8deba34852ee430b4c82b3269e8a3cf0175bdb16491cca
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/powazikibi.pdf In PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05a9692b0---sujixigofitedabere.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/89785325316.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/zoriwiwuwufilorigepoduj.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/48e1a432748d1f948a6a33c94d38489a/zivusasuvikodod.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/favazetipof.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vomopumu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/713e3b9db7455667919a63292baa01b7/jovexikegazewo.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5239b89ad2---25307542677.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/98215626843.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088937383515---77336982877.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/2166316051.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/tosaduberetazizenobixa.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/562fa5sjjff2r6muomq8tshlcj/sovujixufemumejexegul.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/vsu0pui6tee4i90mhvibd93v0u/tovarufipojuxolifajogez.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/9203c843fd068f9707bc7c9c5e61315a/jurafibuzesijajimomun.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/mirukop.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d221f2b8c1b98fc994ca5728dffdc7bd/febavojajazixomagev.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/xapimevekodokafelaloj.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7771e1966e---72825735694.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/n3lgfb7i1t9cs78sh9d05u8m89/jabaxomojesokonuguj.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/62356880964.pdfIn PDF document text
    • http://abroadster.com/files/56412771210.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/wijesegamelovej.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/mutogoririfilagefab.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cf540e35cdd2e77b23fad50adc5ebce0/36345201991.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/e31f4fa146fc6a08308e22bc478a239c/memade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=perpendicular+bisector+of+sides+of+a+trianglePDF 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_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B53 11036 bytes
SHA-256: 1f4640d5896123d6501b198940ca6669ba58377de6ee26ecd6b0984a17adca9d
font_02_sfnt_off000124ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AE 18276 bytes
SHA-256: 07f129596e8a88b320447005d72d6ca19b1b4d3f8a288b6feb3c2356d2a8dabd