Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd679185531dc59…

MALICIOUS

PDF

84.8 KB Created: 2021-07-04 02:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3126a6d4827a1de84fd5712ae57bbb97 SHA-1: 807301051ef6c9c31cde2e39cfa95cf28ece1b85 SHA-256: 2bd679185531dc595a9885ae5ae05ea736bb1d0e403c3ee55ed87d19b2ef34e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=torchwood+dr+who PDF link annotation
    • http://dharmapremipariwar.org/userfiles/file/tabakeve.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/titenozagibagifom.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2b9411ec---10212189471.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/75789197253.pdfIn PDF document text
    • http://www.emailposte.com/pictures/topokafiwokezofadunuraw.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/86766070429.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/id5c225q6l6j8kq02tbjnchuu3/xunemuwuxonifosizobufu.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/43352729556.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b342a4cb471efed0365da57bf4521c6f/66542994922.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0720e2bb2cc3bff24e87dbc00a76551d/pogezudis.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9247b45b4---lusukifigekolozajoze.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210630_597B154F92947D03.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/doh4se02c3i2h2n514r8ma26fk/48105631852.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/78035804654.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1d01b3c45b2af7d11ce53b7f5372b6e4/jugisebobebawunejug.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xupetarazovusipus.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/4384ef7acee4ae92150121d36b6ad675/67030391963.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/7a6314a67df0a03f90a4d0ae5d4e25e9/12733795355.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/3f49821f736d03ae4a31c49a9b5c0c35/jeduravipasedopifokifape.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/37739212092.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/70840659298.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d02dc42d769---15232297111.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/ribatadetumoxogaropen.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_off0000ea4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4E 17612 bytes
SHA-256: a99b2926d874508e637398c7cfd62fc5366c8abfd8bfc6b973a2747d415973bf
font_01_sfnt_off00011753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 9712 bytes
SHA-256: 1689d2edb4c504957519b69bf35ec6874e3f2ac67a2efe2eba1bfa2765fdb227

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