Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e324d4e5933e3…

MALICIOUS

PDF

91.0 KB Created: 2021-08-21 23:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 38a78de65465b7e62c1e17b6be9865f9 SHA-1: b2762750323b599b0392172bff10362420dcadf9 SHA-256: 2e3e324d4e5933e366fd7b549d326da2790bb3b8fdd2c81777faada749d4de33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://coretry.ru/uplcv?utm_term=just+the+way+you+are+lizquen+full+movie+free+watch PDF link annotation
    • https://festival.bg/fckeditorfiles/file/galokinubixujarokatur.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/7d69b2070bd44eb3f706de82a6e39cae/jexepaper.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/jasawanajegumexur.pdfIn PDF document text
    • https://toocapen.com/files/wotenesasogalokatufa.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b8bac8bb357ee70d2206df3effcc300e/14313821734.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/69705579822.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/4418902e4e07e5bfcd93eb04836380c8/mavedurulofivobize.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/99433035997.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/wizutomoxavawifivomul.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/k2tnll9vfv1tgeb8g97lg7bh62/zisoxiti.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a5c1dc86e---50187942589.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/18040767869.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/lhmqt42k2g1l6d70jlgvvvi24k/muxexitubojosenojo.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/rilomaladipudonokofebi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e7d7ea8ebe3815680bc489d6b92141dd/jekotuxoduledurapew.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce92bd8dc6---kewekaxo.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/luxixelidifelipegan.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/44707313095.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/tuzijizepes.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/48014694735.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/000edb25940749f6ede34cabad5555ce/kokunurotunavitoparifosax.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/74951100684.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_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 11164 bytes
SHA-256: 0caacdd67dcd44e4bdb5be654e8d5434f01dc86f615583f13cb60d70b8433970
font_01_sfnt_off000117c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C7 16932 bytes
SHA-256: a9fc0fc53f28fe3e853d12311f9d062a169f41d4f78b589f839a4fd3100084a8
font_02_sfnt_off000143bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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