Malicious PDF — malware analysis report

Static analysis result for SHA-256 7482588ada8e7941…

MALICIOUS

PDF

98.2 KB Created: 2021-07-20 03:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 15af1f84adc89929b43d816858bef3f6 SHA-1: e1d53760d66c5afd115e85c0b59c42cc63619d39 SHA-256: 7482588ada8e7941510f7c2c0a1570a6dcda5cc593c5ee2c762ebbac0ce8aa7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to domains that are either compromised or hosted on disposable infrastructure, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://sosonomo.com/ckfinder/userfiles/files/zuzebibomotor.pdf In PDF document text
    • http://agendatourvietnam.com/hinhanh/file/lolupakuwegofebu.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/xedodepibiguvanupufeduji.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7405eeb75---22151152083.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/58921214209.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/lufebi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b1eec897eda---35665829766.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9676bb757806c2e98c6ed527ed4d09e1/38953807369.pdfIn PDF document text
    • https://magerp.org/upload/files/22077535984.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076930c43f36---rumif.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626e0d5493---vexinukew.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n2ugpqhrcqtpb8rtfbronv9oq6/bevife.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/gelonoxe.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/021338359462.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/buvosidale.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/52965483718.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/badarowikedokod.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bacf1b91880---turakivit.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/55931990699.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e944abf2620---88269945606.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff5ffc1882---74110271263.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b25c05de4---rusamesofoxunimusizefej.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/muwazebemododanufekepakin.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5eea8c425---19013208442.pdfIn PDF document text
    • https://kopari.hu/files/file/gefipalegutelefoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=10+questions+and+answers+for+job+interviewPDF 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_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 11048 bytes
SHA-256: 9c849414cce875fae1ad72c2cd9f4c958593cb3bc9042382abe2a1252e27ba89
font_01_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 17044 bytes
SHA-256: 5f88e96ba80eae313b8b2995d034da8a2d6afa0a50a5215b96f768b16a197d77
font_02_sfnt_off00016346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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