Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d0af62848289f1…

MALICIOUS

PDF

92.0 KB Created: 2021-06-26 05:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9cde6ae49ffd023e3482ca7a86abaee1 SHA-1: f067964682b0a5c62f94e49c154955423ff49726 SHA-256: 46d0af62848289f1d9fb5b5e81ac58d09d0d4a2571f1379e62b4231b9c754c6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely serving as a lure to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8629e25cf267f2f6bb6676dddfd47c0a/45042055667.pdf In PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea131a310d---rotaduje.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3b6609daf---jadetajab.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/83f750380d298bd208e01e0af1172627/pixexosokadewuro.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/19322966484.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f5890058d---69258107785.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/57f5c81a1357d0f7cff456a15ce75067/78251910582.pdfIn PDF document text
    • https://mauspro.net/upload/files/91873573857.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/57470109551.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/pisax.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094c09dce056---22787492037.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210618_31D0706D5297E597.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/30403027328.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/4hi898htre0qg0imujab8pqoq9/47955584701.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6033d6226---tefopazuvovewuwewoxoxes.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/77030b8cf3f2fa83864ab48f8945d2d4/26498800534.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/88722218415.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/wexofu.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a891e550125---kitodumanonasiwo.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/86a796e9f4c890ef318ba523ce07fdf1/vubaxerixanepexane.pdfIn PDF document text
    • http://cloverdiamond.com/file/5753037184.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/9oird27109e99r6hjc2s21kga2/39935946338.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/hfl58bp95mqqggn809he8942b5/88569543883.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/s4ah75j06klic5m9aunp2vuq70/79544580293.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/8a50fa371bf6b846921fdda7ba216ce4/nezufolokeko.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c320e3ae757d155ceffeca1428bc57e9/22833660309.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/wifojapabejiredumizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sealed+power+piston+rings+instructionsPDF 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_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 17140 bytes
SHA-256: 3cf79b8171019aa082318344c41940b4b9bf128ca60340af5ab27122dc3b4a7d
font_01_sfnt_off00013111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13111 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14928 10952 bytes
SHA-256: af317331c1a77f516fd103d8c8845aedd2351b49c7d73db64c882a852c218b7b