Malicious PDF — malware analysis report

Static analysis result for SHA-256 682e64e4e49f814c…

MALICIOUS

PDF

74.0 KB Created: 2021-09-16 15:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e260d43e5e3e9f7e7c08a82120d8c9c2 SHA-1: 9caac7b502e31a2cd80558d0b9bd8eb0af1349ba SHA-256: 682e64e4e49f814c20345df6f66e7d7e5a935ef6b9359c36e2b2a6aefb46957d
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. It also features a link farm pointing to multiple compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=pokemon+light+platinum+rom+android PDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/t95tcfutc096s5nc8flnft5gej/giwadododavore.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b934942e5---54625438458.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/96554631425.pdfIn PDF document text
    • https://istanajp.com/contents/files/ranalom.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/58426342148.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/47600406034.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/daniwarasipafo.pdfIn PDF document text
    • http://totoumi.jp/upload/file/22705960385.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/rujerinugiwul.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344cef80c6f---jikadivipofezasogazed.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ajo4tauaehntuvjfp9ostud732/60341217454.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mekojujorokuvul.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///45730181659.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613552f42eacd---jekezaxunexuxelubol.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/4486659835.pdfIn PDF document text
    • http://air-con.ru/upload/files/gamekoxu.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f76c7465a---92530532878.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/62982072438.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/pawukibarezi.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/84856891090.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210911120932.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/jufokuvesusomi.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/pefukitivanadefetagiga.pdfIn PDF document text
    • http://tommytest.dish1314.com/data/html_editor/files/24090586869.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/kesatazo.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_off0000bfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD1 16316 bytes
SHA-256: 2e986139efcda4004bdc915869c9a07ad9d9cb95e4ea2dafbc03291ef72d3d35
font_01_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 10864 bytes
SHA-256: e0132065df6d7120693e43fa7b05ab1a7dfec98472e4bd25fcbe49edeb759dd7
font_02_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1