Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4014b2bb594ed68…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 17:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 427249787250d6f23abbf774f4d32bf3 SHA-1: 24bf1bb2ed83e22fa78381655c0c245fd623e248 SHA-256: d4014b2bb594ed684af8605c5d247215de3e7f9f817649df2796a8d726ebbef0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure aiming to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=hard+time+prison+sim PDF link annotation
    • https://laplacedesstores.com/upload/file/limewodosogofaduwur.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/72179860830.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/50088045410.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/tufawadenijinoz.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/45891547375.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/94325063492.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/jepomabazere.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/kejoluzisigavuxosobelen.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/jifurogivibowud.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/somuwizomuledor.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/39624108362.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/3027657477.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/gatepim.pdfIn PDF document text
    • https://rezilta.com/psum/admin/userfiles/file/mirazorer.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/44879059179.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/vekimitibupes.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/guxitatufejiwi.pdfIn PDF document text
    • http://artio.pl/files/files/26200004210.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f860a3b81---25790470347.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/92303990204.pdfIn PDF document text
    • https://strechybenesov.cz/content/wozupejirumeligogebomijex.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/zipogav.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613735d394d3d---6608939911.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132db1fe186f---najefupesinebixetesuwelo.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_off0000cafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFB 18204 bytes
SHA-256: c94fb8d30b0cc7a1c1762925d9512601fc283af1da15856c430d3441c12a0723
font_01_sfnt_off0000f9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EC 10500 bytes
SHA-256: 1ed41c04bbdca11c5577c19345226432ae1d38779dc727e89b967b1b9ebc5a4f
font_02_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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