Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfd60621feb0947…

MALICIOUS

PDF

90.6 KB Created: 2021-07-30 15:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: df6ea9ae7196557f50ea89cd3721911c SHA-1: 3d8a9662491a9e87f9ee144018830b4214632098 SHA-256: abfd60621feb0947a422e1b4879877ffff9bc23703bd180b2056a28192d9b2ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://alakharia.com/public_html/userfiles/file/90715117354.pdf In PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/48c1fb5659ad8f82d5385baf9dc71630/dabesevonotirokijuj.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a722b0d9f---56866157101.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/xinegulufakesiba.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/l7vunrka9t734lkjnc2ofj76eq/72349844035.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/xemurirovalajovoneviku.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/17719866992.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/64516270743.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/48803783327.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ad2ae4ee---75795926980.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160868d4ab4b8f---43615101216.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9f4158732---1945218990.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2oaoghp8uooev9p8ckag5pbok6/52906211211.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/wibuputifabenif.pdfIn PDF document text
    • http://muszempilla.com/files/file/21694079606.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nvgqnbuoqukiqjr1sh6qdltn57/biwexijobijolodekefotolu.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/16454550456.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/24321408558.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/84790326162.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/zugurokagipetawumenez.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb85669d29---julitixanixi.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c578fb73ea---43624870079.pdfIn PDF document text
    • http://fitviewer.de/files/file/jutozajadowem.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a4511d5339b---37416567803.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/64833055495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pixel+gun+3d+generator+no+survey+or+verificationPDF 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_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 11204 bytes
SHA-256: 9654643d3fcd8ae9f4e16d4c6f2d59b95de8226ac0064c73bdc3256f4894170c
font_01_sfnt_off00011396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11396 17924 bytes
SHA-256: f9307e951ee5336722ce7d9cdb252863fc5b70ff58a70b6bd6eeea4b992a2752
font_02_sfnt_off0001432a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1