Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cb52d8d7c73c14…

MALICIOUS

PDF

90.4 KB Created: 2021-09-04 23:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 877beb9e783659a4b61a45897daeac0b SHA-1: 47d436940922245b980ca08330371aa451b2fdce SHA-256: 60cb52d8d7c73c1457faf638d5671fd8ad309dde8f3854d872cc0f4fe5339569
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest it is designed to lure users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://archism.ru/uplcv?utm_term=basic+electronics+components+working+pdf PDF link annotation
    • https://airbays.com/userfiles/file/dasiviboga.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/surij.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0de2d40d2---dozomad.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c51ca053f1288f3c0349e2bfdfb6b75/sodixugepefaxijobi.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/xorivumupanileridezesisu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef0378db4a---81648180103.pdfIn PDF document text
    • https://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/dqdruprmgvkdp860tbtqkri62o/37821055566.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210701192637799.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/jujopudosa.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210619140803.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/6805b931923d6876364ebf25ea6de267/50207420865.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1d1ae98ae---xibixilebupej.pdfIn PDF document text
    • http://sireny.net/share/files/14462769244.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/2e74db9a2efb469c2af969c5e2c841d4/39074674525.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/64336043885.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd375bc810d---25401692345.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/mapudejefalaranalovarokuf.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ae92835c73c96c85d969308845fc2692/61192130848.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/wetudidifajelatoduf.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/67010460239.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/47039184593.pdfIn PDF document text
    • https://kawanmto.org/contents//files/32354793247.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b14c544622fa61e296fcbcf45c8ed048/togokojelidogevubu.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/hp06nit2b1hsmru7t75dn21oei/febutupepebibagekoxatane.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/poropuluwomibusowirixis.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85f8880c6---48771983583.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 17416 bytes
SHA-256: aa6202790ef0f2c12b6c42d7108663a082e7dabb7a57ff93fb42ab9626a38772
font_01_sfnt_off000129a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BA 11196 bytes
SHA-256: 623d739601fbc79f6b42291f2c4593a72d07f147b36fb4b0540a853efa24259b

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