Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5c699326a600f5…

MALICIOUS

PDF

79.2 KB Created: 2021-09-07 10:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7068b34f833d9ccc0df238c62265e0bb SHA-1: 487d3343db751587f6de76df092730552b4c672b SHA-256: bd5c699326a600f5330b14ae0dbb6185c49b8312bb3189585efed307d3021a47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it is used for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://ingegnasrl.com/userfiles/files/363395103.pdf In PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fee955898---pakadumarusakezi.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/23699386735.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/25500276628.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/dazibelalufunibopetidikel.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/17302942933.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/wasuvugebikobavalazigadi.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/18567830230.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/jukepalodabof.pdfIn PDF document text
    • https://designclarf.it/file/14118146237.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a441ed84ed84284abd3ceb3c6b84146f/tejemobesuwefilekubikose.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/3202613081.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/dugazoraxebijapuxijugoxaw.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/8521817558.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/76776650114.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/bimezemeselibar.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/kolinesiruzuni.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/89222446736.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20218201315128637.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160832ee36c19c---menobekipezinofikopa.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/sepavavulonev.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf9c7a1bd8---76132034120.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/dolepupetarom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sat+subject+math+level+1+practice+test+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_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 18336 bytes
SHA-256: 2ceaa409727870ff824127216779dab88474357e57e783fb0c425d287935147b
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001153b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153B 11224 bytes
SHA-256: 20ae206febcff4c4aeb7c41778906079f06056ed316091f25297fdfb06ba7fce

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