Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc1144ce1f1a84a…

MALICIOUS

PDF

83.7 KB Created: 2021-06-25 20:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 39812780c0552f8d44e091bc1366d245 SHA-1: ae228aba03f42f6ac94478283f273a1b1f06cb89 SHA-256: 1cc1144ce1f1a84afa2e70485353528171eb508f6a276c9743805b04b8cf7771
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous URLs pointing to compromised WordPress sites, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or SEO spamming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f60960796b---ludiparebikowe.pdf In PDF document text
    • http://angarakshaksecurity.com/userfiles/file/8021982096.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/fovuvudobuga.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fa5431366---denumu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/7ouvfrjm2vahj8n8n6dkc0cq07/sowabagarukidiwuzo.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1b50b6f01---sabesew.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160706017426fb---regul.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4654c82307---lidogup.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ef565c3532d55f87c4fd5c0b5f62612a/kaxuses.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a66c184fa54---63887842995.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/lorakexizo.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8edddc53926aa24a9f6553ff58e191c4/bupadipavepibem.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec74dd1c33---koluze.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/zisativinejelefiziniwu.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a9e8f3b5---47987822058.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6e606dc2028657253f6a58a1f822db9f/jenurelebag.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d6552a21f---jimananalex.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/89a3205a32bd23a3b06b6d267fc3cec5/dubuzusokumamig.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a22657649e0---18990495900.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/pulejefigigifudedusutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=squatter+settlements+ap+human+geographyPDF 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_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 11044 bytes
SHA-256: c7d8a0fc74da18263f8ca9aea59ec6d51cf66b3cc0820e2e6325265d0dfdedec
font_01_sfnt_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001187c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187C 16036 bytes
SHA-256: b160678cf24b33fcdb18909c4530927db18b86e27241c8f275699a4f1bd013ce