Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec4f07e157ecea0…

MALICIOUS

PDF

81.7 KB Created: 2021-09-07 10:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5449b0e796ddbf00d87c99b6eca36b3d SHA-1: 73ff831bf576a8693b94a90f2a0d3df73639125b SHA-256: eec4f07e157ecea0ba4255d3877e9aa15ff60385a831b85b0640155ecf8d8783
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deceive users into visiting these sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://villamishkan.com/310renonew/front/images/files/bofokaduvowijojojo.pdf In PDF document text
    • https://dursunguney.com/userfiles/files/dojifulivulo.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/wowewilitawowosisa.pdfIn PDF document text
    • https://sinarwaja.com/account/files/40999772308.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/71493117098.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161168639847ef---gawonizevopimiz.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/17272473869.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/pawegizefiru.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/tofagixixasegubimolofif.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/76620339904.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/metowosasosana.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/rujimuwugap.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8cfcd0bf---powepixefumoxusajo.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607238e92403c---10992971930.pdfIn PDF document text
    • http://adlinefor.com/home/webagen/public_html/korn/data/file/41301812760.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/97077676838.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/kezapenelifetipaborebite.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/kamagedunanir.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/jipibokoxirut.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67376a74c1---41664914486.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8c2c4c88e---mulinijuxewulijawi.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/jewademokewapisedikobu.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/30429078758.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/bazavunejigesa.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/rafozolewebisisizidimuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=bissell+proheat+2x+pet+manualPDF 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_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 18120 bytes
SHA-256: 6fc1fbaccb20abc8775a045e5dc11cf85a35d777358f10648a8e4114f063d3bb
font_01_sfnt_off00010816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10816 10892 bytes
SHA-256: 5feb3f3906a0d0f99fdd604838dece97020b15a82971af05621bb90832d383ba
font_02_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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