Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f0dbcf9523c297…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 13:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 977983ad407e89569ab5e47e548cd8ce SHA-1: 13a57e04993fc0dabb8a5240845b7479814ead06 SHA-256: 17f0dbcf9523c297d1d6f4291acdc96a831b69046fa0fe95c1761027ae869cac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a pattern of using disposable hosting for malicious links.

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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0543450f73---67902851867.pdf In PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d0382d55---14050350719.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e6735605---25371682275.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/neteguju.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d5a62fcb---xexeviwudiza.pdfIn PDF document text
    • https://dm288.com/slicice/file/robetuturalo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8b37f4161---20510698690.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/26129248937.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/qcjflh4qjuk7cdvfkqhg3eoep4/poxitavi.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/30381525466.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/sulepujejabedisejexasadux.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e1f3bd4f6---41743714166.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/bimorimuzajuzireperinibe.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/82424323908.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/pavezalifigutupifufedenog.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/53494779493.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/1810014087.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/srumnh147obh857dums6rresf2/17158961265.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837e1678fe7---vefebegu.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/dudazuwetepoxomaz.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/fapidivalebesika.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/70604255863.pdfIn PDF document text
    • http://ortopediaszombathely.hu/editor_up/ketumojagatanenobereru.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/muwomagov.pdfIn PDF document text
    • http://hhtaitung.com/CKEdit/upload/files/2755396418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=physical+pharmaceutics+2+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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 10996 bytes
SHA-256: cfa62fa989a3dc21a7aac81c24e2d8c609ef8387570f8353cbbdf0e610da42f7
font_02_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 17040 bytes
SHA-256: 9d4201c5621e6ab34009477eaf04243edb45ce62f498b5f541623373300da171

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