Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eac2cc00d0f7bdb…

MALICIOUS

PDF

68.6 KB Created: 2021-09-04 08:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e025c38fd07823be98ab6a1dbeb54414 SHA-1: 24c4dd6fc641b1b904d6aeac56e498d8f334d066 SHA-256: 7eac2cc00d0f7bdbbfcf28bad958ac07b2ff1b2683aae0be2d001f1b76fff5f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads, suggesting it's designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=indhu+madham+saivam+vainavam+book+pdf PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850f02191ec---zulakonif.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608072e4358a3---21873092924.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/fupanubojopijoranez.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/42795486652.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/45377295681.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/27409180468.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/retazumekojomevi.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bfd525420---3208568896.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7427220fc076f301f6ad101e590d5eec/xajavifagu.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/90045770739.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/59675583601.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/26776794ed39267ab5b1f3d4bbc5fa9c/pagovibe.pdfIn PDF document text
    • http://thegioicamdo.com/upload/files/96139840267.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/42045833662.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/35778592934.pdfIn PDF document text
    • https://pixel.bg/img/file/dosozajalinolurisazew.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7t51bbq88iim8fhg5ccoheg1g/20695875233.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/rubopajutugired.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/38154222163.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/duwija.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/tuwodipedimibuvatetimoz.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/sanigotipuwewalirinom.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_off0000ad8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A1 14972 bytes
SHA-256: d4c82ba655fc4b37e9c3c457508e7302122d0a2712756d94ebba0729e018ff97
font_02_sfnt_off0000eb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3E 10736 bytes
SHA-256: f0c45a16b3141f09ea36780ded44db1f5c89b73dc08591f4948a9b7dee82fac3

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