Malicious PDF — malware analysis report

Static analysis result for SHA-256 704d4f15525acd0d…

MALICIOUS

PDF

88.5 KB Created: 2021-07-18 14:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 25d932c0d884a624f9c79e1d885a5d64 SHA-1: efc632371b22a2ddb4701a338b271fb2270d811f SHA-256: 704d4f15525acd0df0437e5381a51d6859cb448e5c8e34f051151b4c16b8c128
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/e3hl9b93vkfm0snl4iipf9kvnp/93965717762.pdf In PDF document text
    • https://a2designbg.com/userfiles/file/ronevuvudojemexajegezapuj.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210713_183759.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/vemexonemupapodeg.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/fisojodalasut.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/metugewozerejazunodoj.pdfIn PDF document text
    • http://web68s.com/upload/files/ketano.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ae30929c0602765b0280257b42217739/86152689291.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b7d0403db477483fa7836ad0398d5d9c/91611040613.pdfIn PDF document text
    • http://flomojapan.com/upload/files/23414619571.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/2b58fdfee54efd82728d059207def39f/10746631003.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/205075a58ee98ce74d8f8905ef31044e/4915081474.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ged8e2akd1ckmc8smq0eoo6vsc/povuligekesatusenixa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe3f5c958---sumudituxofiso.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ce7d8b20ce---51083271658.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/junuwajizabatokukituriv.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/zutixosamirepunufefew.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/nuzixabizi.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/pilozukeba.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/fekelotewovuraxoxowedorep.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/33199000772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=class+12+physics+all+chapter+formulas+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FC 17484 bytes
SHA-256: 64648a11757bc57c32e58a8c98b83ab30e64963f3adf5d07662616876bbbc738
font_03_sfnt_off0001381d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381D 11196 bytes
SHA-256: ee044a7a66ebf57db399a5e7996c1aa85c9f6bc3495e9df556060d0bd990a1ae

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