Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2605eaf0a0b9790…

MALICIOUS

PDF

103.3 KB Created: 2021-07-01 12:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba5353bb46b45113ce2c1fe3fb7733cd SHA-1: 40515b44fed43c6a5bca076aad3d71c82ed55f1c SHA-256: c2605eaf0a0b979087a61e4df61844e30142d05f4f470c79b4340b40a1904228
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://oniceh.ru/uplcv?utm_term=quotes+about+self+discovery PDF link annotation
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/ff0334cdacd8e1ca6b283e99a4d1526b/jurokaje.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0db76a580e279d910442a336bd001b65/kafisajidomuwovas.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/850e6fd84bdce8cd9e547b07f8e52b7c/wugorolulanutuj.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/7892fa17367a760804ce60fa2df604ba/solaleviniwabobabosami.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fbb040afa---13399575380.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609c31dc56cee---zujarukejonujidore.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/b152532c5b13fa9017b0b0ad98d8bb66/paroworukapuwedejovujigi.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/muvim.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609456ad5ee4a---24107204921.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/sibagugokifonowukusagupu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/be13401dad53abff3ba7d346223aa693/96189953430.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c1467988f---dizafo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0597ce15732031544304589578aeb257/95611495963.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bc66ccf8c---basipig.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210605101353_360272391.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/60426383776.pdfIn PDF document text
    • https://agatanorek.com/files/file/xigitasotawe.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/begibuzuxa.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/gewupikowovifajigitu.pdfIn PDF document text
    • http://kme-kme.cz/files/file/gojup.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/pavesuwixuralitonin.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0de5a2a19bd33d0c08b81e4ba54c6fb3/22797419825.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

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_off00011a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 16060 bytes
SHA-256: c6549f22251a7c672008a5db7f07691c42d3183154b8b4cd03972a27c3442328
font_01_sfnt_off00012f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F80 17352 bytes
SHA-256: e4053d0688730825b5f4abd1bcc3ab6fe0e2018036f2d00951de5bfad727590c
font_02_sfnt_off00015c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8D 10844 bytes
SHA-256: 95dd55d1c8a439ca9c8aa61b1ab9fc8c0647f52fbca9a2c274b56c64291c96da
font_03_sfnt_off000175e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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