Malicious PDF — malware analysis report

Static analysis result for SHA-256 326cccee162ebc42…

MALICIOUS

PDF

82.2 KB Created: 2021-09-14 00:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f0ff0955f7111575c409998c6c758dea SHA-1: c6e96f7dc9d24d42cb964c8963389e46dbfb889a SHA-256: 326cccee162ebc428d5e10c1ce2da901e810c02d2d54f67f12a3783aa43ed0d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e77812582---10538087829.pdf In PDF document text
    • http://ytbozhuo.com/upload/file/10085857983.pdfIn PDF document text
    • https://telenovella-bg.com/files/25673887687.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/46858573025.pdfIn PDF document text
    • https://haidangpc.com/contents/files/73797157198.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/74358157831.pdfIn PDF document text
    • https://0900107678.com/upload/file/lisepabifuputanizo.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/65299352985.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/fibetebefositanixejos.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/63921802187.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/bibuxoguxamulimali.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/busexixowotilibu.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/vulaxu.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/98159836993.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/rinumenimare.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/45226217954.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/bagurozovofosuvifusulare.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/mopuduru.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/wobawewuponosesokesi.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/tozabigokinoj.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/livaretekijelagakakalam.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/66671019377.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/mowiw.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613694814cb52---gepunuris.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/74126226343.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b4cb6afc0bcd415a6e1dffde0f15f2cf/10242800159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=eneagrama+de+la+personalidad+pdfPDF 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_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 19244 bytes
SHA-256: e842237d2d1c701f11d9e7541eddd60fcdda2dc4d192738d66a84a7642aa5826
font_02_sfnt_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 10728 bytes
SHA-256: e046a05ec4f6c35a2296a6fc3725537311c439bf5fea537f8eee0980eee0abe0

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