Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e70faa69fb35d99…

MALICIOUS

PDF

74.9 KB Created: 2021-08-09 12:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dcdc079223c948e41a8febe48dd85713 SHA-1: 6b796a961ccf0c7db68c90208509001212a85f65 SHA-256: 0e70faa69fb35d99867e34eb192ad18df08ccb88377d4e54b3550d07bece4283
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/uplcv?utm_term=david+g+myers+psychology+8th+edition+online+textbook+pdf PDF link annotation
    • https://ayurvedaemart.com/uploads/file/radarozez.pdfIn PDF document text
    • https://tmtteks.com/files/kibixo.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/20525322393.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160888f8fdf98e---5158208776.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/xukosabebaxevoxodexozaf.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7b3fe37281f82a829fc930b6a8f34144/ramesobopitubutokizuruk.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/b95bd2ce9f620b3c0b5dc05686f24ff7/22618537248.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/55603387903.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/04ebcb4abe831881be6e12f79f965e04/vipedavilakuwej.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/xikawisok.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/62974940243.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6a70056f42b9b0b9d536e6362719c2d9/94362557361.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/52109979385.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/18076114268.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/xusomovekupez.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/jogifonolevakipe.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/surubuvapamup.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/pokof.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/ff4bdd6460090880d4689251529fbbd9/gaduzitoxilatukebo.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/a11c00eabb120b618cedfca6a4d14e35/94248546946.pdfIn PDF document text
    • http://email-database.info/userfiles/file/pipilosesojaj.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/61771756071.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_off0000c073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC073 15700 bytes
SHA-256: 8134d6f1c91c0cbf532b6f0fb8e1c0f2dfd2c4abbcb3286a99e61e0e0a51fc43
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 11788 bytes
SHA-256: f2ac893648cd57486bef11cdceb50de270a28918b115ffba35afa0c6967e0826

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