Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bd802176053123…

MALICIOUS

PDF

94.5 KB Created: 2021-06-27 15:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6d6dfaa2c49ea2f6ff333a01c73eab83 SHA-1: ddc6c8f4533fd807fdc3d19462b8e216b42aca44 SHA-256: 90bd802176053123cfd73ab8bc7e6f50f28150fe59ad211856f8a686d77318a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL findings are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/33dalfntl5lebkvfcqlh5jbicl/17171723405.pdf In PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d01378a677d---boxikogizebif.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/varokawuwuzidovuwawexo.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098324f53906---60790938762.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8c711636ed0c92cf19a0c9c6021224eb/kutevitowek.pdfIn PDF document text
    • https://hsse.cl/files/zabefupovixagoxox.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/02e7e683e77b6f861e6fe6093f17ee87/56565324189.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/lnnasj6uri6qr2b9nkkrg7molc/70733410258.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1b7061c2e---kejudutazasimarezakoxo.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/52788246397.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/47517231964.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd03ea6107---25640602691.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/lulovunozakerapeja.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c88c705f---18588491819.pdfIn PDF document text
    • http://www.toptehnik.si/images/lufomel.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/vusorifuzexojavevilupu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0fada3b16250fd1ae09a2f138e218456/91364781917.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021052922235180554.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aecf8578bd7---gizukakenawerafasodiso.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/tezifikipafanijuwelunejod.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160928b6310d0c---nakitipokedezonapodaduro.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/14047425682.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/42920395122.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa5cb7be0d---23969240623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=dams+in+india+for+competitive+examsPDF 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_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 16976 bytes
SHA-256: 9b14b1b883c71eabca99870c0da99f09e7cd5d1c5ee481327827d3e10945a5f1
font_01_sfnt_off00013b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B45 10904 bytes
SHA-256: 739ed7f641182aa23817434741d3b5567b32cae368d206e83888f924e9b93cf9
font_02_sfnt_off00015487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1