Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bb2df7eed9e5bf…

MALICIOUS

PDF

86.8 KB Created: 2021-09-04 02:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2380021d9f91a7c5acbaa95b58f40633 SHA-1: fd26b13c2938b1412d6ea379718d463dfd77a1bf SHA-256: 06bb2df7eed9e5bf27488cb7b12410e4a6610407aba140c6210b0bb1e3fdbe8d
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. Additionally, numerous external links were found, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier further support the malicious nature of this file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://moto-trend.cz/public/files/fck/file/tepazez.pdf In PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a382976e7---zodoriturosoxobi.pdfIn PDF document text
    • https://noddy.nu/images/file/5800660433.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/deturajator.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/69840ce3f25f64800d7874f47f53717a/77668437576.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/66381468342.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161268a8f34d54---64578751112.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/putitomumadad.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/30ris5nrqo3meqtip8li2at6jh/rinukevejokigofobafakuta.pdfIn PDF document text
    • http://15881588.com/ckupload/files/86998761604.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a665a4513b4---dulolufidukukil.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/tatefoxu.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/dd91413c1c0fc6cfa8d18d6613cc2417/47659349571.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/66896417987.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2ad4b3ff58460d78f367f29d8c1401a6/wawekof.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/24f833cf71d746262f7135c5d9093cdf/65252740337.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/sc7ftc5u6006d2nbjpfco2ftpl/kumirijinubajitajamiki.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161283fc0bb21e---lozate.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717a348920d---karolowox.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/e9a87cd2bb51a769354aca8d6e36fe35/2944293494.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/legaropewekiramixaxaxoti.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/13420781875.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/55268832056.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/nubedejufulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=echopraxia+watts+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_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 18864 bytes
SHA-256: 2d6c475d17cf4d8ea60f6a7af3f0407458e76b877fb7634df118e8bb6a5b2160
font_02_sfnt_off000135a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A5 10608 bytes
SHA-256: 2ef25e7f81d07c1f6b7bff2ca45ea06a9d8e17b84dfa0f67ded0b8d25ae20dbf

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