Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e72a611fff4ef2a…

MALICIOUS

PDF

88.3 KB Created: 2021-07-23 07:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 699eae80eb06c940cc09fbfe0c076c1e SHA-1: 76a55b799e1dced77981694b028a3fbb27bfea0e SHA-256: 1e72a611fff4ef2a4bd43080288f6297a9264082b05152e8cfc4d70b457f97a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The primary attack vector is likely spearphishing attachment, with the embedded JavaScript potentially facilitating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cplastik.cz/data/cms/file/pinuwusoma.pdf In PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/fironisapuxo.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/568199e181643b11f077513c34a93a56/xuferomemafu.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/51737227966.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/subabigujepone.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0a390f1b4---39222061988.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/18443642570.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210527230411.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/177qp2j3a6kh8q94vutgoeoeld/55834934936.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/22942656046.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/53628154808.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/fozumakawezotog.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/98592596582.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1786e8bdb---87535001246.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/6592625688.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/3d6a4086263cb3b777f01980ee61355e/91708899837.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/29052173488.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/leruwokupuga.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/5cebff4sqfkluaaaqb400uq901/39198154544.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/162g64t02u8g0kl9o571i72914/94639405648.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/75794507963.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/p89m9it30it77ggsf0ed9jdp71/58251954791.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/cdaf2f858b314f47b55fea4666f98feb/20467553492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=life+life+cycle+of+a+butterflyPDF 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_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 17216 bytes
SHA-256: 226954aeb061826f0cbcf40321cec67ae0f3af926f804c12230997e1fc526d70
font_02_sfnt_off00013aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA9 10368 bytes
SHA-256: 50b5726159470f29ef85d377bd8265a897908f712528f5e6f7f2deaeebcc1237

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