Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7ccaafe46e6a56…

MALICIOUS

PDF

85.8 KB Created: 2021-09-17 14:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47b06266a0c9495448fc580d085a681f SHA-1: 545a590426081eabfb5d809625a8be548ef3cbce SHA-256: ce7ccaafe46e6a564ef5ed4fafd334c062d3da1010459a9bae0b425a9cb25eca
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. Several of these URLs point to compromised CMS upload directories or disposable domains, indicating an attempt to obscure the true destination or leverage compromised infrastructure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://catamma.ru/uplcv?utm_term=cadillacs+and+dinosaurs+game+for+android PDF link annotation
    • https://lbjgold.in/ckfinder/userfiles/files/kufinisigonosefodofuwazaz.pdfIn PDF document text
    • http://blueyee.com/upload/file/100600081263.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/nubupadagotozunuluxobawuv.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/69599900945.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140e932388fc---68705920234.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/73135756793.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/pavol.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/towexuwo.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/85226580928.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16144506348ab5---63098908091.pdfIn PDF document text
    • http://sbairs.com/datas/files/jiwapenuxakazakotafepoba.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/kofokumavogefomuwawada.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/sobomofas.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343916dc6eb---41839743274.pdfIn PDF document text
    • http://pasted-radio.de/web/files/kararavozupi.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613095a2cd1c5---5452015470.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16139897e8b09e---bixorefasopa.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/76513206057.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/vakezasutubelenuwake.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/55420384529.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021091304571094.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/nobejaxek.pdfIn PDF document text
    • https://dptech.vn/uploads/files/91393893029.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/35292352507.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_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16572 bytes
SHA-256: 163bd3c0e0e3b4cb6db4da57fb8d3e4c9d77ded6fdf9e144c5d0760904650ad4
font_01_sfnt_off000118b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C8 10852 bytes
SHA-256: 532590b5b8856180fb7cffd2b46c7e7e2aa57188dc6c52a9a994bead711f2a5e

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