Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29c200e54df4273…

MALICIOUS

PDF

69.8 KB Created: 2021-09-16 06:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 237361bab47babc40fc6ac86db8f4ea2 SHA-1: 3a38df2309dfb3694f264d81673f8c87e0494fab SHA-256: f29c200e54df427324b32db4ea1970385b24c42832848650fcf44fbfe243ff01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised or disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=iphone+11+vs+s8 PDF link annotation
    • http://highspiritsmusic.com/ckfinder/userfiles/files/46045233957.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210903_075033.pdfIn PDF document text
    • http://huefpdf.org/upload/file/17413844721.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/93125537536.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b462fbbd5f363c168d0edee7a553a198/nepamuzoborekutepixufumi.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/petunebeseji.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/bijupamovalin.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630526435.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/bokojuwirewuvuvurujav.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/wumozojon.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/24641159867.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/629e3a505d62abefd9d210c2a5540eba/44069204038.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/pbuldjfsqd3hc1j0aqjkgbj977/gigadolaferukuze.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/gubana.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/51627027322.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/fonikoxugid.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1613f361d3a346---23049663725.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/32541451506.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/nitetijoxironeja.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/sesulimufagunorake.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/rivigajet.pdfIn PDF document text
    • http://studiecarriere.it/uploads/file/nenajamexovubipare.pdfIn PDF document text
    • https://dellrein.ru/content/file/zidal.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210914_D6339937E317D652.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/42484259328.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_off0000b519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB519 14832 bytes
SHA-256: fbe839b6004294f374a7da5e74eaca5a993f0d75ee0553b2098bd38d26c41b29
font_01_sfnt_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 10128 bytes
SHA-256: 6bb2077212a327ecc8ac8820d8a01fd707fb032b69b15a7a79c380ee42241046