Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dc7cffca9d1cc5…

MALICIOUS

PDF

75.7 KB Created: 2021-07-21 02:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9009f8af410c84145f7915aea1aa5cd6 SHA-1: 11cd636eb7fd4398cda43809d7bb94d841a57694 SHA-256: 47dc7cffca9d1cc5116d1b6b75cbf8647052a38e6cc37b4f349a4c35a2905ef1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://peilimineko.com/userfiles/file/rakerunavorebagin.pdf In PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/eb4p9pd2qt8vlipjl44vkksop8/13431167428.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/xudufokeviwuzugite.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/25851298003.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b022850b0d---99414971719.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///lasitidefadusifev.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/wujorexifizugadevawedesak.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071221da8953---pusaruwijufez.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b1205e9b38a---60315406484.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/46786367818.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/75093957719.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/b726fb588dbf25951d67dcc56cbd12c8/19485694198.pdfIn PDF document text
    • http://www.centralperdana.com/file/lolozimene.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c42c03ee96a---xikadokupogetune.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be825576cd3---barijifilumesatefikusogix.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd8bb8444a---49473788317.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/jebivuwupijemenima.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/642949889.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/zubenebatisojal.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0329a920dfb4d2f86b82a8b6951cdc76/94277242886.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/gorexajisumajorirobo.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/figugaxixow.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14283a599---xafijigagugipamudeko.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092ff7f492bc---rogifetalonuworazomisito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+we+convert+pdf+into+wordPDF 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_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 16452 bytes
SHA-256: 501a62bae2f4da52017abbae3e393094a7d63bfa8af9d5636832e51419189af8
font_02_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 10380 bytes
SHA-256: 0d70a8b528517363b699c71c5c3036dc1db36822435b3c75ffdea4a3a35d28c6

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