Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e74b93fbd71a23…

MALICIOUS

PDF

83.2 KB Created: 2021-07-05 10:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d3328c2a3f9f405fecd019fed2bc6470 SHA-1: 0c9784cc42077c108f731e98ca48cd10e8478391 SHA-256: 00e74b93fbd71a23f6bdb68d8cf121af0e8fc31aaa07bec8a74c727eb5fc1e4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting. This behavior is characteristic of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e9ce1727119902c7d559b00f2cc016ee/diwog.pdf In PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/dupefujitakemofigozukogej.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/82234ff5625dc96b833293b9577bee3a/winalukut.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/wisiletedelimixutez.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1da4c479a1---tujezumufug.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/poxaxi.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ce337496---musuxabudalu.pdfIn PDF document text
    • http://yepuco.com/uploads/files/dowemipetifix.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d9383131aee73f7a01a3c7694df3226b/79124629047.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/sevazimodakudexozesa.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/eh4ie45q7oid80l0i71l2cemi1/97035262130.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/61b8588f94d83212bc9ec921f6a5ec9f/54507289072.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/kexikixep.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19b782034---93569128867.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d7271a385d8fd8b6b1759e442dd26336/tazivodidoxaxevevixesiw.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/f9du6cu7vuto6e9uh2egq0cfub/fopuxovajaditumod.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/16727418824.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/11515497213.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c5adf058---gisowatub.pdfIn PDF document text
    • http://africareview.in/userfiles/file/60442512015.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d379a94d02cda0d2298f500dcd4ce0e8/4929911847.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/jologafuvanumuxikafi.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/murudeti.pdfIn PDF document text
    • https://daismene.it/file/88587641483.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=debussy+clair+de+lune+free+sheet+musicPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 2056 bytes
SHA-256: 98b42ae7edf34fb2b388b45edcf0be0caf475c76329145a0a83b0fee4cd3f5fc
font_01_sfnt_off0000dbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE5 18904 bytes
SHA-256: ac1abd82a31b0da63c1012c79eea782ed33f65d5840cc0617be8379c0838b80e
font_02_sfnt_off00010d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D67 10976 bytes
SHA-256: 5fdc548235dd84c6dfc8dbec27184ca907dafed83eea65dab017324477db4e85
font_03_sfnt_off000126b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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