Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fbdc5726039893…

MALICIOUS

PDF

75.9 KB Created: 2021-09-21 22:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 36fd9e93f7597432083d4f957e8ddf29 SHA-1: a41a6e1d71d708ea395d590f0fbde456251fe5b8 SHA-256: e2fbdc57260398939ab1f0ef494473ab5ab2f48181b464d6f2299a1277c402da
164 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream, which is a common technique for executing malicious code. The numerous external URLs, including those pointing to compromised CMS uploads and disposable hosting, indicate a likely attempt to redirect users to phishing sites or download further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=movie+app+for+android+tv+box PDF link annotation
    • https://maintogelonline.info/contents/files/78980883946.pdfIn PDF document text
    • https://datajournonepal.org/files/kubetizesap.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/silixu.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/i0f7anoe6ohdnpmeq7mdq35ce7/8031933923.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/82343299882.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351e755866a---vamevamuxomebedixi.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/12075272346.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/aeb1e6ebd2e74d01a317831323f7e694/reduzilaxufukik.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613885c50cc84---rupivored.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142d0644a139---norerizofaluxofufofode.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/83244864897.pdfIn PDF document text
    • https://dom-titan.rs/files/17429476292.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/55014565739.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/33617538276.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/xeduvikotetaxet.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/bamezajowobinezokimuda.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae794168d7---38387090381.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/zugaxaromubixuki.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/nobuvi.pdfIn PDF document text
    • http://wami.cc/data/files/jefaroxiwugefuwadi.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/ratunufaxufunifoxim.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/dagozogovap.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16321944894527.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/3339014497.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/lowizejukapot.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/bosibamawoverabasuvuvanem.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_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 10580 bytes
SHA-256: 77e7f855adc8ae1c804ac4d9d92644b6940840bf4fcab5f459970c6af14ded0f
font_02_sfnt_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 16308 bytes
SHA-256: 6b6b44c2c1d3929507c3dea5222e6b48fc5deb2bb0458e7bfa74cff5b33c6711

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