Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3507ae381811cc6…

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 15:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bd4d8b3a338d16b4c35311a2f864bdfc SHA-1: cdbf185a2bf4a240c9dfe575289473e474984ed1 SHA-256: b3507ae381811cc613209b58a31c7f51b6c540322bac580faec6de4b8406f93a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm designed to redirect users to potentially malicious content. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://philabc.ru/uplcv?utm_term=mermaids+the+new+evidence+watch+online+free PDF link annotation
    • http://ambulatorioveterinariomariani.it/userfiles/files/lofolituzokefufarefegoma.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/79143441374.pdfIn PDF document text
    • http://stylekd.ru/files/46823466892.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16308343341504892993.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/39908744282.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/11503469593.pdfIn PDF document text
    • https://digireg.nu/upload/33007908865.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/fozenaxugekuxukosanikeri.pdfIn PDF document text
    • https://akconta.com/uploads/files/vixibaravisop.pdfIn PDF document text
    • https://bursac.net/userfiles/file/xekavamogajuxa.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/supujevivazi.pdfIn PDF document text
    • https://blv.by/upload/editor/files/takitezapodidaf.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/43471298210.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613302889c1db---toxopamuzujet.pdfIn PDF document text
    • http://alvitraders.com/files/nizetelapatagimoxuna.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/vumegusujobalilutomekizel.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/71716322431.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/berosedobo.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/nasazerajawokazalegugeg.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/pllmt86qh037h0o3376jsjdadb/pasokeloj.pdfIn PDF document text
    • http://rhondachem.com/d/files/96421336693.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/tejadubul.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161316b2817aa3---domasimexegu.pdfIn PDF document text
    • http://prestopc.it/upload/file/63433648017.pdfIn PDF document text
    • 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_off0000d720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD720 17844 bytes
SHA-256: a2c420458324f46377f91c8731d6b725c4073f06c16e17bd23c09e0767d48645
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 10884 bytes
SHA-256: 64386506fded39bf02ca02a43bad62bf3478841e0cfc17f72862f25f8b75f525
font_02_sfnt_off00011e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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