Malicious PDF — malware analysis report

Static analysis result for SHA-256 416e4ba049aa3c7d…

MALICIOUS

PDF

82.9 KB Created: 2021-06-27 08:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d9ec3db96bb61fccf478df261041b64c SHA-1: ec10c9f8b2c6b9da0d4cd28e9ad2eba3244cf8fd SHA-256: 416e4ba049aa3c7d5f29e5d0121a32d9d3d556e3c046e47f3ce13de6a29cd427
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://argumentua.com/i/file/34468458464.pdf In PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a7cbb8d11464f29f2309693b7a6f7ae6/68424179952.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/c8413274fa1ecbd35d16137feab8135f/25513297698.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/5c4084f946833645b63ac87d68e18b7e/kapixelogosot.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8d8d06d7---16672515869.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d1e884732---3061817373.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/85085158616.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210617_8DAC82B0C60BDC15.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8a612d80---72907605815.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/72872961928.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/3b07f4def7a3133cef25cfc05b89322c/3002944468.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071c91d8a88f---41746475867.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/piropeluvete.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/fb9a818015089c0f464b81e249df1318/56934926284.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/lojomumimutasalijexiwot.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ostnrcm900o57p0c3k8ibocfdh/11457216320.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/87310342465.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071435ea013d---82021357781.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/f72f265a208397df7957744b8debadbd/dabuburunugak.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/63342999479.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3ea21e6c6939fe0bba2515922931576a/muxabapanegabito.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607454c18a54b---nunanuvurob.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/b1be4443234e96a659f99bfc517dab7c/fufisapi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4abb5fc71---reles.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/90824696503.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/26e29e4692b11e554bfffd6d6260bc98/samokitij.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/22434889071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=cds+ima+previous+year+question+paperPDF 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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 17036 bytes
SHA-256: e542cf5e8cbb8b8553247180287995efaa48f69fa9efad6b724d1f2e3d664643
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 10964 bytes
SHA-256: 4413fa56a84ad62711512569da89601aa05b49c61358c93bcdea1da4d1f5b23a