Malicious PDF — malware analysis report

Static analysis result for SHA-256 095eca5442727b10…

MALICIOUS

PDF

73.4 KB Created: 2021-09-11 02:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c3c7d955a67b189f9258c9e3bd7cc437 SHA-1: 8c91f28dc7fcdc5b8ad016d090950d1e591e7291 SHA-256: 095eca5442727b100595cfb553ba9d90bbb07a3a25b9e410cc31d1e0651deec9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://crysiq.ru/uplcv?utm_term=toca+salon+3+mod+apk PDF link annotation
    • http://skogsformedling.se/bilder_umeny/File/lijumutesufurazadezeti.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/64574629207.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/zevetutebuxolosirivugizoj.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/xajos.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/46476361220.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/010a1ural8kgnj9gf0l9gj3nqf/32938991397.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///witunojubezol.pdfIn PDF document text
    • https://kaparatt.com/images/File/20109683692.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/31934570143.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/48652648194.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b3b8e7126---jomigisimekufijefaf.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/096c5c8bde7d5e6fd703f632614921ce/90186812305.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/girojexunefuwip.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/efed35d24ef2a83c8b703f6a35267a6c/wawepalupisufasusutiwis.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345a243f052---munakuxid.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/56988989516.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/juborovoxamu.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/winapuporo.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/joregaxogobopunefatabito.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a0c56d04e---48169927431.pdfIn PDF document text
    • http://artospace.com/pics/file/fotejesetafalasatagi.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/33978429208.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/44863793234.pdfIn PDF document text
    • https://bachson.net/upload/file/nekikizapumerovaguv.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/72181885603.pdfIn PDF document text
    • http://apsons.eu/files/file/witugilogabifamuraf.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_off0000bef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF8 10480 bytes
SHA-256: 5d566c5fe9dc991d098c1fe44552458cebec45fba6f93280b3b59a4f0e07f603
font_01_sfnt_off0000d6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 16200 bytes
SHA-256: 01649d3ffffa3f1a55172581b9297589ef8e8684cc08159fb5b2aefb6ff6bd70