Malicious PDF — malware analysis report

Static analysis result for SHA-256 196ece86ee0f19d4…

MALICIOUS

PDF

88.3 KB Created: 2021-08-01 13:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8c239dedb749a4a1ebf33a308ae47e86 SHA-1: 9fffc6a89358e7d60bdeab2ef3408ec4aaed86a8 SHA-256: 196ece86ee0f19d4be953604f0121ba6b7c85f4388918a395bdf58da42fbf59d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous URLs, many pointing to compromised or disposable domains, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URI heuristics and link farm indicators further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://dukra.sk/editor_uploads/files/ginelozunuvawowenuwipad.pdf In PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/96ka1g9ek1r02rdugmc0d93tnu/19500097003.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/92069348331.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/26813687523.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/kijir.pdfIn PDF document text
    • https://p1gtac.com/uploader/files/dejogusomarubaxesagawema.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/43073767653.pdfIn PDF document text
    • http://blueyee.com/upload/file/072329351176.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/99649417357.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853e24cd213---46839132747.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/24229994446.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5755b06f71---3563187814.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/330ea5f2ce95a048955e0d3e4da5ef85/fozepuzalewufeton.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/30977751680.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ac33a3886---2244432665.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/56af11827b5377621c57a63830838ba9/vapikaniledoxelatamop.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/boropovopupusa.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/80206979394.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b13e1f53059c6cf388f8223557becc36/49719880567.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/dapipa.pdfIn PDF document text
    • https://beaszemin.com/files/94481982580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=dibujos+de+las+vocales+para+imprimir+gratis+pdfPDF 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_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 11296 bytes
SHA-256: 2eac26665eeffa018f3c2c5270d260a11281478a61931181ac8d9dbcfbc7e024
font_02_sfnt_off00012527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12527 17616 bytes
SHA-256: 66146f0d150f3bb61ff98cc895675b9b48eb7085369868b97c3dab104ae656f7