Malicious PDF — malware analysis report

Static analysis result for SHA-256 0605072aca98f81f…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 20:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5da3dd36406520fe30b9373b09f0436c SHA-1: 2aadfc4f8d04d2bbc9132d8450efdb32b6b7c9aa SHA-256: 0605072aca98f81fca266d1f91682547d4d223e69f8168e867120cb4dd652e94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95', and ML classification strongly flagged it as malicious. While no scripts were explicitly extracted, the heuristic firings suggest the PDF's primary function is to act as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://imagebeaute.fr/userfiles/file/57192536552.pdf In PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/4467213722.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/dafot.pdfIn PDF document text
    • https://wittnebel.dk/file/pogitezakak.pdfIn PDF document text
    • https://etimes.mn/uploads/files/fokaravujalilijowur.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e21187a23---57885572264.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/dujuranagufifojokujaka.pdfIn PDF document text
    • http://megalaserasia.com/upload///gobalerunelax.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161324f45ab04e---gaxaf.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb636816d---85401224089.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/fonolitutalenexolo.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/mipogolanadeje.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-1/20210901213604541841.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/57610451421.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/18065763717.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/62865555677.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/wuduguk.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/koxifenitez.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/goravolexiz.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/xudulodimutekogomonazad.pdfIn PDF document text
    • http://patroha.hu/file/44061935141.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/64dpl1d12mdhe3n9rcnrkeqq87/zuworitotevavifisenigabim.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/rifedirapit.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/39018248211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cours+civilisation+fran%EF%BF%BDaise+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_off0000c6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 10984 bytes
SHA-256: b829762f58547d80e05823c2cc3b38d235f418d9c7135b8d949342d9f13ee77d
font_01_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 18516 bytes
SHA-256: 1a867f8e77aaa68d7883fe794ff8a8508fb2b1fd4710a2709748d8f2f278bdac

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