Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2be09659f60fff…

MALICIOUS

PDF

85.2 KB Created: 2021-07-04 16:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f26f901f9639806bc40b06415c2e581f SHA-1: 6f0fa05696f687671538c1cbd46bb1a336a379ef SHA-256: bb2be09659f60fff8a7755bb16b19a0f85e5ba06a61bbf9d98a9a7eefb504d41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a tactic to distribute malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=threads+in+your+face PDF link annotation
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/kadisetiterilasubobiwapi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160799bfb96d8f---ruzijuwub.pdfIn PDF document text
    • http://metall-press.ru/files/89665551557.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/nonin.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d6487c1455a9cb90d8aa93b8c42d508c/zifexesadasokem.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/eb2e48592013eded998f8335abfb6654/potelipekobitedugorekud.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/dusobekekogumowawawupi.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/76352508191.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607779f6add57---10628992267.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160932af633493---gewepafuzimexepa.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/df69cca99c3845e161d38fbfcf8607d7/28120131389.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f89621bce9f727d106826ca93f22b560/xulujesorewovasejopug.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad11624c42---napawojipofaganat.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/72b7d3f53dae3ecac0289ced5f3fb713/30118220888.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/0d9886c50ecd9d34ed2b40da89ec0e19/lanejenoromodumotuju.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/euclv7g3g3dmpuqmnvjjt1nht8/61738339775.pdfIn PDF document text
    • https://chptravel.ir/data/file/83661127559.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7da1df36bcc9070b0f53d39b02512b89/82344878754.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/lawifevidosedulizawuzev.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vei03mcpbe7q2u54rfg1lqg333/joredugoravu.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/5924313731.pdfIn PDF document text
    • https://edarky.net/data/file/ketiwizaburepebofi.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/bf6a587ddd2e1716c3e19742dbddef8b/74200796468.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a7bae18be---kazukujel.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_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10608 bytes
SHA-256: d9bf3308e7a4c74cb7857dc755e16407cac9cf9e36ea6181fab57caffa0f2527
font_01_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8A 16964 bytes
SHA-256: 2dd4867bc2fc936344ac4fcaed5cc6e24f8e49e66b5e4cfea2e6c743107d5036

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