Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abd63b6b4aa949e…

MALICIOUS

PDF

84.4 KB Created: 2021-08-15 06:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ac38abc85b90a032f3c717266a6a5dbc SHA-1: 3cbc99ab316760b0ebb1350228d77cd445e0f3d0 SHA-256: 0abd63b6b4aa949e7d0eaa3fad897910fe8ab769fbf74159b5cb92e1c34078d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm on disposable hosting further supports its use in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://arohitourandtravels.com/userfiles/file/41955701533.pdf In PDF document text
    • https://sunnyrosesschool.com/userfiles/file/16366298379.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/2771491413.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/69ef963b4d0844b2037f5c3f8c4f19f0/5953091992.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/mosevalu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85ee2b18e5---furowogunefomivibol.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/wegusosigaluxesoxorab.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/40882944605.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092719f91845---49509178421.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/49024868100.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/96827536803.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/72407979509.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/49667693706.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210803_A5B9DE2FFE6BEEDC.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/pukonekuxapinozibat.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/nekasokibepigego.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/zaguvokudinigasif.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/701501e8f06308ec55f7e0c5d6c6135f/9538776368.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d99d8cd84a6---41118086064.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/tebuge.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/lutururexugukoputuf.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/mekalipawawudajuweme.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/385a9524d7b88959175396e9438d9e52/wixopetupubozesib.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/4i23m3bmb9a1fpm1qc8bfgrom4q9j6ki/pevaxizoresusujim.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081b99e5f647---13691290147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=marathi+balgeet+song+videoPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61C 17456 bytes
SHA-256: 5d2a81ea35dae809d40c758f9a97d1e59553da1df6216510ca3a03e845fe7a50
font_01_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAE 10724 bytes
SHA-256: 61fa86cdc7a8aad628a5145a71d927184c6e1577dd56ff52577b4c775fa37faa