Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12035a0d3036bd7…

MALICIOUS

PDF

77.3 KB Created: 2021-09-05 10:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 957cbd240b72d3e8f53d42115009742f SHA-1: 72ce13150414476e4aedb5ccc6e20e5fb92ccbdb SHA-256: b12035a0d3036bd7fbd01eb31377865f633e11ca214bc95395d7c51291828985
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, with several hosted on compromised CMS upload directories. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The presence of numerous links on potentially compromised or disposable hosting suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nitexprofi.cz/userfiles/file/tufisodurepulevevigolen.pdf In PDF document text
    • https://fontaine-eva.fr/userfiles/files/10149711337.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/runemakagafodumeme.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/50159117130.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe47a2428c1---97969953705.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/rexogavaperofov.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee39f75f216---59485309158.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/95915186930.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fab695fbb---sudopa.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacaeec765---norefoxowaw.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ab934bace---gipixufodavezonivifo.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0172a4a2---bebigowiwefubewi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086234e1ddb7---2799231735.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/kutabawezuwezixapexus.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/68187081898.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd65bd54a---65701665892.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/pabagajurisatubabufomes.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/latamujeladovega.pdfIn PDF document text
    • https://ka-base.no/images_content/file/dekixujeneginen.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607677b80304d---73861686922.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608666580a0cc---lutuloguwibomulu.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/15289934548.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/64635217669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ap+chemistry+integrated+rate+law+worksheetPDF 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_off0000c6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B5 11232 bytes
SHA-256: 423a243e64bd560fb9f664361edf532c3281cd4ef0beba70887300ff62d967c1
font_01_sfnt_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 17740 bytes
SHA-256: 6da99372954b12fb0c836895f0bf66df56fd0c11eebc9c44f61768ea4cd17b12
font_02_sfnt_off00010ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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