Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed4561fb8dcb65c…

MALICIOUS

PDF

101.8 KB Created: 2021-08-05 05:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7b27687d448792128a62b3415ebcd19e SHA-1: b26edf613ecf407bc6821e9c4a04ce1dd8c56dc1 SHA-256: 4ed4561fb8dcb65c76fa182c427600a97049781b1b603a39b5950cdb3157583a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2ec718298efb188b7aa66129f37a225c/tixatiniwezebakevopire.pdf In PDF document text
    • http://soupworld.de/upload/file/vasutizumikapomenoluvebem.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7d10ace2---kutikumibiwedejeg.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e9464613---regewixetub.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/38826115817.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/b1dff920777a30f9686e2c1ce53715fc/lasiwafefidonopepokivudar.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/dodifasikuduviwijawusowi.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/59278903925.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cac558bd52---58566910600.pdfIn PDF document text
    • http://esistore.be/userfiles/file/xedekekasojosiwe.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/53d4787662ca9fbc6bbc4382151f822f/49492550599.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/gamatunuzibutafuwafuj.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/putabalivebebesewamapiroj.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160790f97798a2---xuwiferiwosifoxubobiba.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/41dcbabdeea175dcbce8735ea1bef72b/putaw.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/sugate.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/tevub.pdfIn PDF document text
    • http://boxethai38.com/upload/file/sozawilageruzi.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c2afggpn39lgdgnklo9r6s1uaf/wenujojudonisad.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/iu80p8glci8coomebkgdoe3nn6/67477730472.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/pinogowamefuda.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eae41d4d46---xuxajixuwepemotamejikedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+calculate+joint+probability+distribution+in+rPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 19840 bytes
SHA-256: 58ffc8d3868d567f586554dcdf894aa5fca029d66a40bfa60a20ee9b273a41e9
font_01_sfnt_off00013e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E60 16324 bytes
SHA-256: 88976fee8794d994ce33c7c48e889d1f4f55a8c53a38ee77c89ee20c8816ba22
font_02_sfnt_off000154ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC4 11068 bytes
SHA-256: eade7c316b6e6d5d0b7a8e3c89a27a722befd60514bcfd74490972de45dc83ef

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