Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22800af8e19b0b2…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 18:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b2779778c8de5ec84c0103d771ac8d9d SHA-1: 8270fa653f98191f9cb3e8fd8ae5762a1e958d43 SHA-256: b22800af8e19b0b21b3bffc3fe621d74aadb3b842d14303634a6587673c4f2b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected by ClamAV as a phishing trojan. It contains embedded JavaScript, which is a common technique for executing malicious code within PDF documents. The file also hosts a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://queure.ru/uplcv?utm_term=aplikasi+edit+video+chroma+key+android PDF link annotation
    • https://fejlesztes.codefon.hu/js/ckfinder/userfiles/files/86619650892.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fikinisonabasa.pdfIn PDF document text
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/fojepubopetopolosepeka.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/jagiwonodibedexarere.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/supibomuvalijuw.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/zosigebuxagoxijabevarasew.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/dudaguxalowopegep.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/geraxefelagowusozel.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/wujigulewopogoxaxezegijo.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/rc3arviqmi4nn47m9bvcsfu46q/wewogefonixefa.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/76131313006.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/savezinopozosogaw.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/14972897796.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/32239282973.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/guxovovijopufix.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/zilexegazotakufize.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/roxapebuwonobilevubu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/48e723cb1a4a791078f892db7c964a08/xevumo.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9540b2cf88b1baadc28232fd424668d2/kixumelolamo.pdfIn PDF document text
    • https://kaunas.cvzona.lt/resources/img/files/jufoxowinawu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613f117483da1---46775736285.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_off0000aeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 11032 bytes
SHA-256: 24a78542984faf10e1075a84cdef56d78be215de5e83a614dcc88874184aab73
font_01_sfnt_off0000c845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 14552 bytes
SHA-256: 92c54b4b0b4a09f2af57b282153e89211a0ffa2b9731d7c0bd47b6e17e771f7f

Open this report in the interactive analyzer, or submit your own file for analysis.