Malicious PDF — malware analysis report

Static analysis result for SHA-256 7226d7f7cd4ab60c…

MALICIOUS

PDF

109.6 KB Created: 2021-07-30 01:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 626c81380778948352c0dd3ffb70b858 SHA-1: 7b88b0961a868ffc35130ce5cd54f2c25dcb2fc3 SHA-256: 7226d7f7cd4ab60cfa6a1e80aff2c746f9e22d40769ecfc2900d7a75e1b7023c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host further malicious content or phishing pages. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an attempt to manipulate search engine rankings or distribute malware through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/4a74f145cb3cc4945379c62b36f6c6a6/zaxabazajetum.pdf In PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd9764eba---83338613177.pdfIn PDF document text
    • https://angkalaris.com/contents//files/zesuze.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/72535490343.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/83778306880.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/h5m7ra90atvb8tj6cpdrkgd0v7/besilixapufivujijabab.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/1365996866.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/4b36b147b258dd24bfc3bb1ee0e7f3fc/68026379299.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/4942975a8cb8c95ea17714bf789fac2e/xuwumedobora.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94a39fd72---29628498827.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/70600645288.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb567bdb6ec---sepilolupimot.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ca3ea375999e9786940bec59db04bd1d/maziwezopiseze.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/pusuxatabi.pdfIn PDF document text
    • http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/dikojosadikoxujas.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/29911519596.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/659494abaa0054aa68a6efd5938ee9aa/mapefuxodeka.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/bamifeg.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/96590386521.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/rexamejijofovivagel.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/67234bf4ff1437712c5ccce07659b7d9/fapabusoxupi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eca79553c---munoweje.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/b5d8b984d4e9d068c1329a1b5c0a2bba/xerisomesumafesumu.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/tebufozapitumuloloro.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/98797993656.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/delejuvaxisa.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63159224229.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/7047d932a5abf191cf077c2c44d4dce2/95757320637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=present+tense+verbs+list+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_off00014ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000162f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F7 10416 bytes
SHA-256: af60a51114d3f80a0556febe4325cc86b018194a2ce9d82f362cdd9806cff1a2
font_02_sfnt_off00017a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A70 17128 bytes
SHA-256: 2500604824962f4f6feceb66e78f15fe9cdac37b8b384d502e062a2ebe0d8e3f