Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0613c602e81f37…

MALICIOUS

PDF

93.9 KB Created: 2021-09-16 23:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 90c928cec6456063bd6c58e47cd564ab SHA-1: 70e830b40690140db4a99bc60c824c52390fc531 SHA-256: 2f0613c602e81f37bcfe8efbdefc6e44dbd4b7c8cc2b13fe216ed6d3e3f080f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on what appear to be compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution, despite the lack of executable scripts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://giovanninociti.com/userfiles/files/40957632519.pdf In PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/kufinisigonosefodofuwazaz.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/92661134291.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/zonamijuxujovig.pdfIn PDF document text
    • http://szcftz.com/upload/jawewatemi.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/raniravitizisavananodusa.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/sixesakitudamezozutibunu.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/10783877061.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/wegegaxumodeketifewibu.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/71801803128.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613675632010a---11876866649.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/33641411763.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb37a0f5f5---3389712920.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fc775052a---vafadaxes.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421cb5a42d9---movezamawugalebozikokezi.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/84116075241.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/61457823613.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/jabobixut.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/zuvewiliwimeva.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/veduwarog.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/dunewupodikutivevos.pdfIn PDF document text
    • http://amandamaitland.com/images/file/28185840460.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/gadegikibexiwaji.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/11b143a13bff29d862316dfd1e579bd9/jinomurovajegatis.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/pimupijogupewesezasitini.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/22319515949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mi+powered+by+androidPDF 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_off00010124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10124 21932 bytes
SHA-256: 8dd0f84e29171ae3c3a21b2db7756bbdce694bfc8c61fed188c3b885fa913a6e
font_01_sfnt_off00013aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15301 10408 bytes
SHA-256: c51bd41f736fb67d80199f3987b01eab06205ba0a738c1744688f2fa5e1a4001

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