Malicious PDF — malware analysis report

Static analysis result for SHA-256 be56d59364d6e873…

MALICIOUS

PDF

82.5 KB Created: 2021-06-29 05:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3823f2b87aa69877b097dc8645a9518d SHA-1: 21a95eb254553e90223bbe9e84bac608e9ea7843 SHA-256: be56d59364d6e873a2370a39b4a93fa5f8a62e5dc18aac3b3f41a2632ec4fdc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure as a link farm suggests it is designed to redirect users to other malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1ohraqk5uh2vmfjr5rrodvfd42/17318278245.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5e41a802---luvarunaxik.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/8554538687.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/0bdrun84j9knlci5u6a50d4bvk/66013410189.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/50569801258.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41806a0a9---malogegar.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/bunaxujotib.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d3b3d4ab---bivedukarekatunevu.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210628121626_1140269724.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854cc670d6b---75904129479.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/kelebikumebasujet.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092fc9cb06cc---54055560610.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/monupiwuvivezusorora.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ad9e03766f4e4f132cdef25062819b74/dafefanuzuvob.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/89172353303.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/botd20iig8rgeukn92o4lhhclq/zusex.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160854183f0059---55499779576.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/9758179839.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a223c09d50d---53021364487.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/zapogup.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099b872a8052---kuvawafumi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160758bc5ca7e1---66027999755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=prothorax+human+bodyPDF 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_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 10532 bytes
SHA-256: 6580b31a3a50d5e8d6ac42cdf4cac643599da87732a1fad9d386c128210e22ff
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 16832 bytes
SHA-256: 34323da95e17a555a4b47ceb7eb4379a90f8cc7698af69238f9a8ad1499727bc
font_02_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.