Malicious PDF — malware analysis report

Static analysis result for SHA-256 46daece5c77db0bf…

MALICIOUS

PDF

98.9 KB Created: 2021-06-29 10:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3c2712fbceae700f8842a560bc886f10 SHA-1: b27f4ccfad6e3e572ac54374bca81c3f33a94460 SHA-256: 46daece5c77db0bf3a2bd737e7378abd3511238eecd6287cfc506cec4ccb6a18
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://synerhu.ru/uplcv?utm_term=dale+cone+of+experience+ppt PDF link annotation
    • http://446888.top/userfiles/file/wawiwewotedew.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0a04262862c52cb9ece663fd92da437e/25481659002.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/kitufisefolidarumutufe.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/fezudupoto.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/vdfj2p1ia7f0r9pond3bfj9tj6/mufakizulivoxufizutaj.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/wukuwomerematezu.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/jlilidldm8hf0khr74amlg5lmp/1023097887.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/0351c62318a90be856fda3fe3e591b7e/bimefusigidafoxuj.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/bbe335f231f1d173874b01597bddc250/98563474644.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/4fc4d844b89851c87cd6b4dbccde8281/vemamutasepapujesub.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/35453013898.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33a8cbdac7---vikakuperuratovutu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d84613471---15298675533.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609422fc9a7ca---sisomeferononubuwe.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/89eb9f639a28cf2ac5449ab0f5c17390/40117645397.pdfIn PDF document text
    • http://clingac.com/d/files/zavajodaxumuxusim.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/3335506186.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa4f99a49a---gakopifedufogesugew.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b1396a5b7d2903a71d2328b98c666bed/zulenekutawotajilewazol.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210610_6BAB0BEF9B72533B.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608553e3cf2a4---10462649544.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/tjupl3vpth7tua1tir921uk6s3/gipurasi.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089f970cddc9---2202369427.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608567fd04aee---15104381932.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_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 17788 bytes
SHA-256: 30fd5da8b0fb38b95e3fe78b2b99d779baf1e63142faf9e740b871fdd40cdcdb
font_01_sfnt_off00014e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000166a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166A3 10408 bytes
SHA-256: 3c9ab359f9b90fed49b4a914388cae6ed36c1df87dee8404820d4585af1973b6