Malicious PDF — malware analysis report

Static analysis result for SHA-256 030959de9bce4b2d…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 04:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 253a9820c14ee97dd9824134bf52f78e SHA-1: ccd82e76df6d433668155f7b7188c05b1709b2fb SHA-256: 030959de9bce4b2da4bc394aa0fb1f434f909819e51a8c34e58e567f66744f10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML classifier score. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086fb7bd2fdb---14159326212.pdf In PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161311f7b54f7a---pebunimelezug.pdfIn PDF document text
    • https://tckontrola.hr/files/xiniwudeveril.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/90601358819.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/76a7e14953e1bc8783a81e810a745f28/65375131284.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/370200438abdd32b7b15a6552ea23a76/rudilogilafox.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0967c3cd24---surubatagi.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/najizusesixotowizubir.pdfIn PDF document text
    • https://sambelteri.com/contents//files/12102042681.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/gudekiwavulerutapefoxu.pdfIn PDF document text
    • http://teakdeck.pl/files/file/60596927031.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cf3e38243e125ce2c8c637df9ec10f40/59563810091.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/85229995556.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/mirnb6b8ftpisvmj6q08ae2hiq/lemikowerulamaji.pdfIn PDF document text
    • http://apcmagon.com/userfiles/kobizozexowutizofanime.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608861f451ba6---rutidemetemajodij.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e92ab3ae6427d4c3c7b377d889423973/kesuko.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vafisabig.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/xixinilaleweserudazofu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b896cd692a4---79674660974.pdfIn PDF document text
    • http://yjccnc.com/upload/files/86777752975.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106100824485758.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cfa67bc24---49456292566.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/gotunafajovimurodimo.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/30885736790.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=descargar+libro+sabor+a+chocolate+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 19208 bytes
SHA-256: e94833074e3fd3533e1f1298c1f73b08e15ec3dffac5c665a2de6a1dd43375ef
font_01_sfnt_off00011296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 10936 bytes
SHA-256: 12ef8cf1267ecbbd8f27e02f8ccffd4467b4fdf56e753779c7600f9e66eb42d9
font_02_sfnt_off00012ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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