Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afde6545e3c4291…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 07:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a930ad886d633954669fb469b7f61ee3 SHA-1: 19a0ca6214f368543af91b9469ac855b8e702eb3 SHA-256: 6afde6545e3c4291716a621b615af7d4f34f27eec232e4951d9d75e4bc737443
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://northcoteplaza.com/userfiles/file/58798735792.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1660fcb2f992f426d0c603c96a0517f2/dasumafegaxifejubijawas.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/bewijapuvuripetu.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b078e13a86---95478821284.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/224ddff03ddc292199347aad8f525aa6/gedutozusunutin.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/vatizapokawewolaxutiwa.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c886e1745c---dazuzafuxefo.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b8012d3f8b398071306408687588f84b/totogatapufu.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/57044149674.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff95bcea76---71894132888.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/wujuvaxejifalida.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/55870288935.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/rinurisin.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/nokikaviwadewudirow.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf2109ad8---28140811833.pdfIn PDF document text
    • http://davcpundri.com/css/file/86753557307.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/572s2gue0d9gh9a3kc0vrvbi6f/94936849284.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adbedf61e33---15390622025.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/ln47q1mgl89cunc29mm0jirr5h/pisatinojipokun.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/11f1fe33b6eb428433f5a9427d70dd08/tuvoled.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d45adb0d1---19349438553.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/2710te079vs8oc9cgrl45ejiop/jugujize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=feeling+exhausted+after+workoutPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5442ef1b26---nivopotivipixu.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5963c66dc9---woxifexenixuxipog.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_off0000edb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB2 10992 bytes
SHA-256: deb92783695d2caef3b7e1a2d71e9223921337ff77aa4336a00c6e2cde777d38
font_01_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 20100 bytes
SHA-256: e8faca2ab9ac2940ed2dc7e76e39ace1b2d256b62bf351f8f0e230c3b8394b53
font_02_sfnt_off00013a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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