Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22729ca5e4f9b58…

MALICIOUS

PDF

112.8 KB Created: 2021-06-25 21:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4625fbdb931e046d4eadea7d6c1cc147 SHA-1: e324cf5b36d0bd3663fb48b1bbaeda6791e092d0 SHA-256: d22729ca5e4f9b589535398a6526db98509e4fc36c6ca940dd26eb5b172262e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://drafthe.ru/uplcv?utm_term=functionalist+perspective+sociology+example PDF link annotation
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc787a503---26682114378.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef5f8a513---lisubo.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/70036025669.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f876573312---wilojisorosu.pdfIn PDF document text
    • http://plncse.hu/php_data/file/sijifojewig.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e5b1887ca---35814153272.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a521edc6a16---ropekebexijijetitodalug.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096df8fb975d---6592346538.pdfIn PDF document text
    • http://pronobile.de/catalog/file/94252330271.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/k0i6ll7dmo5rj0gcc0e8vbcq28/58163039690.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a3b69858f---dadamagonexamudes.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d1d2834959db550d8b6c877f17934867/tuxumas.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/gawometunovumuporosarib.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4c256a574f5a47725d1c70d06fe413fa/daresosatilafusure.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/90847562747.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/86874459204.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/74d6a5f6e39bdffd94f0ea1a3a0a0308/9913389928.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b58404c0211---dusulujupu.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/16184943761.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/b91k0b5ac03qfc50rt7dfsrbdj/dumuxuzalotir.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce67187570---mojan.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/edgdg3ao97senl7f4b69e4l0o6/76989702330.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607042846355f---70824407226.pdfIn PDF document text
    • http://abnicum.com/files/file/tozezurefabul.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p8k6jjuftj3qk102epeaimh9gg/zuxoxuwifezalomezurejeg.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_off00015804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15804 11076 bytes
SHA-256: 4705dcf43e838ec533835fef138ed13644af7f1c417b733938e35f6b1aea79e2
font_01_sfnt_off000171e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171E0 16876 bytes
SHA-256: ed22e14a97ed3a79732810c6721f743aa39bfd876a60dbe2617bc67fbcc22954
font_02_sfnt_off00019d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1