Malicious PDF — malware analysis report

Static analysis result for SHA-256 475b7bd626f0445b…

MALICIOUS

PDF

81.7 KB Created: 2021-07-02 20:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 31378620665694d15de55184dee93b82 SHA-1: 75ddab4edc5bdfa3a76633f0305485f4f26b7bce SHA-256: 475b7bd626f0445bcfa3d750490033cd2ba141770ce54a2104b64e298fcad4dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://irlanc.ru/uplcv?utm_term=i+was+so+looking+forward+to+seeing+you PDF link annotation
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/u4pi9sebqhu2l9n5vdjrjalsjk/52732316571.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77bd49944b---luzegovupizarejixanulages.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d3a5b4d2bad733da643e613795a15b3f/77651331091.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/37421962770.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/63017a1d221130b5912831603485d95d/bepazen.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/45085303494.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/71661824419.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/buzavo.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/1e31d14bfadfe9979a466daaf5537937/7502253201.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6u5r97bcpbio9dp4ptrm0rtn14/65891409598.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a37b16b2e5---74389679059.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/sukipizuwuwobuwoda.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/48904351753.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/45880c96ff5f563fc1391322a03e63d8/zuvowonigofepigigotexim.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/zirijoxajenakatatonekil.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/moteleresezodewuloja.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/1umr6ustgq7u87qjljfe6vga7c/puvudopak.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/dosavegemokobi.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc9e7b4fc---fiburatesegukukajaj.pdfIn PDF document text
    • https://x-software.cz/data/file/75505097525.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/pifirovafav.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/57910af3da3214c778ccb3922070150d/jatadow.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/c9e56df6d784bd1a694b68711fd2f855/gijipulifu.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e50ee3d7c---dezepanumapokaw.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/9b422678310500718c9118192af5b144/wekoxinumunopudomulawebov.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_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 10872 bytes
SHA-256: 2fb9b321e6ca28926b80765e9f42af9f7b3bb893f7bb5e5da059c21197967bae
font_02_sfnt_off00010d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 17544 bytes
SHA-256: 72c1fbe299455c5ee1754175a9579948d34f08f4fd5c1f2bf19b7f1c7ef95b25

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