Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ca2e5e2a8af506…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 11:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5d0095cf9a2a5aeceb8ca9f80c1660bd SHA-1: 3c41e493fd54d7c83b016e2382d52333a149c53f SHA-256: 24ca2e5e2a8af5061e44e3b8609e6b9d08ab6075a00b1549a497b1773586eefc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=ready+handbook+for+disaster+nursing+and+emergency+preparedness+pdf PDF link annotation
    • http://bbfrontedelmare.com/userfiles/files/50753004571.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608031965de08---63185166812.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/50bbr93v2r1tu31rufaohl16sp/95450677813.pdfIn PDF document text
    • https://kamedia.vn/data/file/65059753035.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/xekuxamuko.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/1g6sb6gtt2uiuq1e42j3dgcpp4/85365743156.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161102cd37e559---silujebu.pdfPDF link annotation
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607d94d72dcf5---tefevuzakiki.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/77943911662.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/jadufobewudex.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072e50716746---31448359950.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/1a634d6dffb6d64616560117aee7ae24/63422097261.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rnegrpr6k2fvbjm8gkitkne0g1/gunopajugo.pdfIn PDF document text
    • http://vce34.ru/attachments/file/gekubidizenev.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d66b8d3f9---13813022090.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/rivajenu.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/74511173140.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/37400900312.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/nuwulafeguge.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/cfmh584u0khs4ju7qnnfr7pil6/kedusitinej.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/42872975670.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2066346d26---20453011611.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/9s3cscke5vguj7bii8pbs7op7e/dawinikon.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/pojep.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_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 17396 bytes
SHA-256: 0026051bfaa473c289cc0c462db2963a6d3a8f46ce0f896448ac482c790477a7
font_01_sfnt_off00010fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCC 11512 bytes
SHA-256: 098c8dc34710c0e7ff254fd9110dd29f825e2c7f7eba2604590070be74442276
font_02_sfnt_off00012a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1