Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c167b07ada84cb2…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 16:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e59b24e93c418f0d1da8d4f092dd7a5 SHA-1: f136a4d26a596c9cb2ae22cca6c3f7790d44b21c SHA-256: 6c167b07ada84cb2847bf8316ba51c9885bcd28d949b0b418e6a449bfdfd2bf7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161371d045f274---redozufipepanilomutal.pdf In PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/17641601751.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/57740629413.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/lotavuwomipotamebabebiki.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/61596758817.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f709a62ca4974ff8681e0194a959da55/foxokokiwotiberuvur.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161309a450ab58---nenudanemowedaxo.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/guvanevelipegavibuwuko.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/jotalanovedofasagawi.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/rusezorumajabadoza.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/84779268182.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210904215130.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/92792862612.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/72309189881.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/wazujozuwojunud.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/84165208903.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613236cb4349e---zuvuzurasepoviketu.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/nesenokikipunogokolovele.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/zetujujepevubozelofurefi.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/ribuwozogeribebotuwola.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/455f408022472ce06fa1dbb2a8d26558/sosopuwijurelud.pdfIn PDF document text
    • http://parentini.it/userfiles/files/modosuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=formul%C3%A1rio+word+para+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_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 10500 bytes
SHA-256: 54fd35b482ec78f44edd71831e541226f41b7f8745013986cd4385e2482f7f8a
font_01_sfnt_off0000ef07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 19912 bytes
SHA-256: 2982acfa4c090d1c0b4f37d3a51fb57fc7e4f9260db0539dd4cc0c542f9010e2

Open this report in the interactive analyzer, or submit your own file for analysis.