Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca9a3f98bc4754b…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 02:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ea329bacbee041c6da310356a32b5e77 SHA-1: e622fb89dc363eec046aeba87695c58c5ae2b5e5 SHA-256: cca9a3f98bc4754b205c32b42c405830e8d97297d22953ab5ea995c634e607be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://infrive.ru/uplcv?utm_term=how+to+hack+injustice+gods+among+us+iphone PDF link annotation
    • http://sbstroy53.ru/img/files/9088421430.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/67969511498.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/nufodukesorurokiwad.pdfIn PDF document text
    • http://isgsrl.it/images/file/69004156600.pdfIn PDF document text
    • http://talesma.com/E/file/kodenenaviwikipuva.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/33956824727.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/67561832701.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/masopaseneko.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210909_070907_8965.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613171fb3ffe4---muzomawaxepelase.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/77446420287.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/maxiriwoka.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/24425907051.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/roveti.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/febogudepavoxupano.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/66326377682.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5c0a7a9f---lozeparosotazuviloba.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/fedimexeke.pdfIn PDF document text
    • http://minhanh.com/files/bamewiso.pdfIn PDF document text
    • https://petikdaun.com/contents/files/malerexakevuwupabapolir.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/23839334164.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/jugetibefof.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/24477275113.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1f287747512f5467732bd089de041a5b/depazuzo.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/zedavumedi.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/notabozibe.pdfIn PDF document text
    • https://itunes.apple.cIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 19712 bytes
SHA-256: ddb1f41abbae60bde9f7eca82c1b4167fb205935dc0ca3bd6d8cda7f6dd43f9e
font_01_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 11216 bytes
SHA-256: 236b40ac02960259e91a7be7f2ef3e9212582a543ccd3c18407ec2230b02cd11
font_02_sfnt_off00013017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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