Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc7ef1032155171…

MALICIOUS

PDF

84.1 KB Created: 2021-09-06 14:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 40334735aef366bccf9d076c547c863f SHA-1: 3bc7c43186d72c3cfbebec694d0a244ae9223204 SHA-256: ddc7ef10321551718fbb0956360991bce7b14d9a726f1cd1811ae9d98adb1f2f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of JavaScript indicates potential for further malicious actions, such as downloading additional payloads or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/a647e52cfe8f95bf59b2eb427bc61749/1559831358.pdf In PDF document text
    • https://asiajitu.com/contents//files/91660932315.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/k5kkjvct2onolctrjjit1j6mh2/77552658440.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210726161232.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/88737266379.pdfIn PDF document text
    • http://fxmeat.com/upload/file/cd270cd1d80c859ce532f9a7b3ab3ceb.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/sarezozizelokuzifijo.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/77803983919.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/sasalavegevo.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/vizigokamopogefef.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/becqaclgq4q36rnh49bda681dc/45771152716.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f5ba1b7f92b1bf39c42c85e576b168a4/kesizutukilewozas.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/43394149980.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/12530167160.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdaec2f78d---21054244194.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210529_8321C47C91E9BE6E.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bb4e4dbdf---26319077192.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac38c3058db---nenosefamejiv.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/luluruzivu.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/71833749086.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f78fd670f1b---bipexarete.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/3apq1jvl7adcrkpnd0ddumcue2/nefubegewimot.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/80683822975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=leroy+somer+r450+avr+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD45 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000c53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 21576 bytes
SHA-256: 856635ce753fa2b6288991ba38a955a62f2ced49eec903bf2424c2d0ced61feb
font_02_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 10788 bytes
SHA-256: aed3baaad37c20fb7c22f10936926c02c1c0ebcbb1a3e2f6bbfb42b2f533f7f6
font_03_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_04_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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