Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ceede9ad8420d7…

MALICIOUS

PDF

159.7 KB Created: 2021-06-26 02:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5d2f33c7155e850c4dbfe34bd04e41ad SHA-1: 7eb8109151fbb4eaf18b954906242da76e54a84c SHA-256: 95ceede9ad8420d7020f21ebc0b04514c697433327f762aa239ea5518aa16deb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, identified as a link farm. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090124a9ee2b---79710848404.pdf In PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd2c953694---26537283933.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/xosutomewugaxibigogubu.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/a7758e1b195bc14a7999edbda8fb006a/7827918889.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769d7c4ce31---xakakugisawojuriruz.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d871dd1632---vidotowudikij.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d8cd13008dc2068d5123405d7e602c46/nomaxe.pdfIn PDF document text
    • http://taskentcompany.com/userfiles/file/61298798766.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/89526272137.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/32c718c6753a1418e3363cd5f316cd11/tananilisosiza.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16092bef19ef97---sogiwiriramejanoluxoridel.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/phtne1entulpd87n8ap6ril4v1/46546666105.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/724a4715922890a27d1a1b990e4a4a48/wotexojamebatamelixan.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/888ab89a514c8466c0d7f08e01e2c0c8/samat.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f32563189---76675478973.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/9toc7h0btf1debl8phnme9itlr/nowerosuxo.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/badujiwijedisijezavitikat.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609565aa67c41---kezeletolakuf.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160739c4e96d02---duxuj.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949d806aec8---dekuraritanusawo.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b7c6a0eac---26201609851.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4hv11hkgk3si8t14cn4e7gtlj7/70515454832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=encyclopedia+of+astrobiologyPDF 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_off0001efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFD2 6548 bytes
SHA-256: 9b8275f3aaef0db9f5f5b26c69d8a5ba1f41d571b2b28823d76589b21dadc55c
font_01_sfnt_off00020647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20647 21448 bytes
SHA-256: 586b4e8d1af0521fee3222ca51fb8ab9a0a7161b876d19b244cad8f505f2315f
font_02_sfnt_off00023dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23DD0 11032 bytes
SHA-256: 68523052736b85e112c4ae201c40271de588972859d2abc9749761d806e14b10
font_03_sfnt_off00025730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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