Malicious PDF — malware analysis report

Static analysis result for SHA-256 146e86029e1c3d8e…

MALICIOUS

PDF

80.3 KB Created: 2021-08-20 23:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b01057f92820f35e5c6a48937afe16f6 SHA-1: 455ec53d6cde5c1eb509d15adf836bbe58d76bda SHA-256: 146e86029e1c3d8ef9c7f6699cd2cde4c15de4cde38585ce68d7f3547e5f6170
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 trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content or for SEO manipulation, rather than delivering a direct payload via embedded scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d5468354---xovisizinenukukeropekap.pdf In PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/440ce6e7fd9c1ba2f2b227bcfecb3a7b/41940558570.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/zijuluvesuz.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/gudesugugifu.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/65603644238.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/d22c691f20496cd223d5d502091d29fa/lebapal.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/porujamigazanibabipoj.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cdca60b435a---ruliron.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160839ad04768a---68761422731.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/mitato.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/pidopexesigolofu.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607779686483f---67023247524.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607cac2eae3c3---zukuwezolefafakakujexor.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d9a0852e8871f3f8932affe55f39ecc6/66204409388.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/bapobos.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/102748fa17cad1593948d5e747a235d1/rasanuregufoxelogef.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/53443071874.pdfIn PDF document text
    • http://ccshecea.org/upload/files/nopakune.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1bc798622---65601163809.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/135320065160cfd0477da38.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06eda8eb0---4937763586.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/dunumilojevekisimo.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6081b7290---senekeluwetakesibi.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/gotizediposujabuvipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=like+mike+pelicula+completa+en+espa%C3%B1ol+latino+repelisPDF 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_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0A 10892 bytes
SHA-256: 99d7a5c7c1de2a524d31cd82468c8cf58007b1c084c97c979b4246cbaf628dd9
font_02_sfnt_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 16864 bytes
SHA-256: 695943ad16631c225f8b9fafff994e5a06e2bde32e139fc9cb00a57be19ad6dd

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