Malicious PDF — malware analysis report

Static analysis result for SHA-256 25927d94d68312f0…

MALICIOUS

PDF

72.6 KB Created: 2021-09-25 20:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 21b4a10dcba005c0e9c26436226f0030 SHA-1: cdbec19284729b4e837abfcbe5193bec0fed8b01 SHA-256: 25927d94d68312f0d7a20a4aab703b65f5446187367590492cf0e0ab60fb6539
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of multiple external URIs and a link farm indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pijntherapie.be/uploads/files/5968276350.pdf In PDF document text
    • http://jawarakreasi.com/file/40061097327.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/60988822046.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/vosanalululeve.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pivuwanimiwurebedixajub.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/3f3ac8d28af54ee993a990852ed8da5b/nozopidarumesimepoduwu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16134fa836f71e---47351989091.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/fuhdi8925eb7kndsrprfctt8a9/wevuzimimowagug.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/filuvafukifokapokul.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/51890382175.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c9b5f2a81d---vovagifijozufakozoj.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/vinigavo.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/39199953419.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/tulibuwurodixolajakida.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/pibaj.pdfIn PDF document text
    • http://kvrhousing.com/uploads/39209459572.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/89828380000.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/74013103701.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/vojavu.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/fawubedapoxujozewazinis.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/76576134961.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/mabegotevixezore.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144288ac0869---nemuninumuwomasuzesirexel.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/1635589599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+take+samsung+galaxy+out+of+safe+modePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C6 17840 bytes
SHA-256: 6311dcf1662306981b4898453c7d7a90a4bcf13328e84f41fe4d03cdfb49f753
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 10988 bytes
SHA-256: b407bcaedcb5f151bf1e671066008851f06db1f481047d649678a9408e6c5503

Open this report in the interactive analyzer, or submit your own file for analysis.