Malicious PDF — malware analysis report

Static analysis result for SHA-256 601ec2b0285e2c76…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 14:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddb0268b7015e5e5fc1167cb0faa4565 SHA-1: dd5fae683648cdd0d242603b97b5f32eac250831 SHA-256: 601ec2b0285e2c76e1605744bd70197131863188353d0d71d7bd6a097fa716a2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

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 https://ketchas.ru/uplcv?utm_term=short+story+plot+elements+worksheet PDF link annotation
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832da717e9c---bavofabididurovugexox.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/vovilugiguvubobax.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/sanuxa.pdfIn PDF document text
    • http://ebus.cn/up_file/file/folezaxuke.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/tgl7dakd41u0p1e4oqmkjh9ugs/xibob.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f8b0771f66420fe6002f7c4cebbec2b1/tafuzisezuv.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/8h9k3mgt7cr3ppt7rqe7afjor0/nopetimopi.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/3731717e3de7b79cb6f34669289542d1/71625490638.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/xuliluzuladopiruve.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/59943770953.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161076d3392819---gizaxapaxetekepemalo.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/61vj2k4f7jl1n1efom35phrg46/14538733426.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/99632509861.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210804105342_1639159281.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/79723856490.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_F6D09F633F5313A0.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768abeae740---lunuvananuzovelovagato.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079294da82dc---juwapibobukurir.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1668a38786---65486771920.pdfIn PDF document text
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/nawujeropovifofadebevof.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9b35d81e43717b04cada3802abc0646a/7656711355.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/17626129350.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/55099367c28344fbaa04369881bc5afb/62473119850.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/bt6fshlbfc5ngl37t81btcjba3/konilisimigovividesag.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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 17788 bytes
SHA-256: 03e76b795f5d6019c0f9585d6821df3ef71860f77e243b5d13677f21e0be91ce
font_01_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001234e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234E 10632 bytes
SHA-256: 23621260160aeeaaa3aeafa98117d5fd2b59c140405c9365533d74fc3adaee07

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