Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f2a921afb48ebe…

MALICIOUS

PDF

83.7 KB Created: 2021-08-17 07:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5eda94740bbc70c16aa1216ea20049a4 SHA-1: 738f88d7241f4c743274f3e6365a48b223d0e375 SHA-256: c2f2a921afb48ebed6b2cbefdb3b38a017dd210288607dd10abbd276c689f3b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of providing a password for a separate archive, often used to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=zootopia+pelicula+completa+en+espa%C3%B1ol+latino+descargar+mega PDF link annotation
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa69d218a97---sojakulasiwavov.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3320572dc---wenuxedodegusibifuk.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/895845da5911cfe8e86183300cd0158e/74622947795.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/paseware.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/lubumezedejimumabopedogi.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/fedilafugedisizewiwiz.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1610611b1c549a---mufafofositusaxagupesadur.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608722ce6a031---romuxelarulusoseviji.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096afbfcefb9---24596348740.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/6061988484.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607359fd4f8f9---nidivapukadidajoge.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/novejokipetiv.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608db099c27a1---najekajex.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/98557952216.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/057a2b4a297152cc6018b92346afd69f/84479208665.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/25589513484.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160940c2ecd063---bomojox.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7f3c454e---98776870546.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/todusikub.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/tudikabazesimowibeguvu.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/cgap5hiahapunodmsqb4ccuo6i/19993854195.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ofjhm2shc37dam2q613nh6r1e1/mevizakomulopug.pdfIn PDF document text
    • https://melz-feu.ru/upload/forajujig.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_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 18240 bytes
SHA-256: 59e3ff364b4b74e310e76536ff03513cdd70ba3471b0db682f04f094b6fc81c1
font_02_sfnt_off00012674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12674 11124 bytes
SHA-256: 705ebf54da3bd5a8128ad3a4fa0dd482442c321d15b099bde8f1021f75008680

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