Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c47c3db4d32451…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 11:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6f31f1662012fd9885e9b5373d47d1da SHA-1: 9468de77030bfdc8e8e29f8aa840dbe7cea1ba0d SHA-256: c4c47c3db4d324510d8b92f6f9c327beae83be18a6dde887f71f93e8add1a411
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites and disposable hosting, likely to download further malicious payloads. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/uplcv?utm_term=emirates+cabin+crew+cv+sample+pdf PDF link annotation
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/nj4eon2kpss5kan9fqfkn4isnk/gejomum.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/wabopuzogekarowo.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9876efff---sifuralarowovikosi.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9jv02kscpicqq23c0234ukub5o/47451240278.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/44516266899.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dc1acfa15---ruxagesutar.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/55195566671.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b4c35129c9c17b627538fa928adfcad2/69566291717.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/damotowojivazuxufipekukex.pdfIn PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/78377324756.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e8esat1eimlsg5rpet75so3rd/nowinemetile.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/b48c4fo0sofsgjsf22u3ft5k2j/tugerugepatuxupomobutidit.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a9d32f3713fd02c3a06ea649a22ee049/23198736617.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/xenagopuxam.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efe15826ec---zoverib.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/33786910077.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16119793348095---45940006812.pdfIn PDF document text
    • http://hodori247.com/uploads/files/67746742305.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/1392343306.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/78799871098.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001002c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 10936 bytes
SHA-256: 52402b725e69b007071f4ca5799582ffe1f52353b1db2bf9189a42bc5c27cbee
font_02_sfnt_off0001194f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 17000 bytes
SHA-256: 281cb2081f687d48686398ad8bc72dbb7a1e3f9634b19171579929a106799fd2

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