Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd782aaa1797eab…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 19:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3edac03aad864b89055fee38f1d368fa SHA-1: 16dbae3bf0cc5dd0dfbb91d6d8ccf851308de1f5 SHA-256: 1bd782aaa1797eabce4823f61cd3ad9ba95b104efc809b7d34965849932f1e7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous unknown URLs suggests a broad redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://argentum.com/wp-content/plugins/super-forms/uploads/php/files/kb7hiqu4l3cd0okaurj2eqe2h7/fanevusuvuvaxo.pdf In PDF document text
    • http://mcutech.net/upload/2021/06/file/1622989225604851732.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/23968371469.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/24881908499.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/tozirunidolan.pdfIn PDF document text
    • http://isvpro.com/custom/files/vabobomotemegegijoba.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a415e9f3224fcc728260ee67d82db643/28535176869.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f8f843a24---susilumusat.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/29358433577.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/9n7fbvpe704i8tbfb70kfl6dud/21504852561.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c3f3446e2---veren.pdfIn PDF document text
    • http://irths.com/upload_files/files/24376613356.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef2ac54865---3628562387.pdfIn PDF document text
    • http://skomi.ru/img/files/file/81569544188.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/rigexutojonolejok.pdfIn PDF document text
    • https://mollis.rs//files/32172466067.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/13543521787.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100fcfb0d0cd---burizimekegeno.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/b474e4e7685f4e9ce665ee06e4de6ebf/14072104638.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/dotisi.pdfIn PDF document text
    • http://irths.com/upload_files/files/78502039446.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/82093280776.pdfIn PDF document text
    • http://chanhbon.vn/media/ftp/file/13655803319.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887a334aa1b---65917495486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=easy+knitting+patterns+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_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 17144 bytes
SHA-256: 2fea9c48bc007b5b85a7514ca056c6317800c0265e022d4f61e70b000b69300d
font_01_sfnt_off00010b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231B 10696 bytes
SHA-256: a4622ef65221521cfa786943c0a3ae77b544303a9ad3d2e82d8dec33ec374dd2

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