Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cc6ce9ec6a4329…

MALICIOUS

PDF

78.9 KB Created: 2021-09-19 21:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 978787670556a5a1a85a153ad6534d51 SHA-1: fa0dd50ad8f438ea542f98bfd4e4ede7a88768e3 SHA-256: 14cc6ce9ec6a4329da9af0ade8c9cf81f71c138e1e6d99e8bd1d152da983e4ef
156 Risk Score

Malware Insights

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

The PDF contains numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate a link farm designed to obscure the final destination, with one URL specifically mentioning 'hago old apk' and another pointing to a PDF file on a compromised WordPress upload directory. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=hago+old+apk PDF link annotation
    • http://ingmarcofaedi.com/userfiles/files/61556895038.pdfIn PDF document text
    • http://timebymtm.com/upload/files/loserikojev.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210907055511169.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/84162546142.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1a568f3b9---35768149027.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/42649295067.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/puguxojotuvotid.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/nofodefaxeruvowelabunoba.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/zawevibexetoredarokol.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/mosoraxinubawiwusogariw.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/senumenuve.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/vupaxatalinapupufe.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/zisokivogaxejipabineg.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16139af02f3a85---defuzufidojoxivukodujeli.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a008ab376e53a03fda379f1b906a6bb3/sokeperenejobuwizu.pdfIn PDF document text
    • https://yuktogel.com/contents/files/gefate.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/sevipi.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140bbae7bed4---41760892328.pdfIn PDF document text
    • https://dacola.com/upload/files/bavexamif.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/27572724445.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161445b3f229f4---43273270143.pdfIn PDF document text
    • http://carywinslowlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wofeto.pdfIn PDF document text
    • http://szcftz.com/upload/8934718374.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/96550423514.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/fafif.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 17120 bytes
SHA-256: 7357b45da521939801e23c2da2ff4aea1158310f10c4bf1e0f50d1901f5ca76d
font_01_sfnt_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C7 9956 bytes
SHA-256: 79c8e45588d539f86f6a1832c29bac64813a31127760dec52486877e1e678f3f

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