Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4054b8d3a15d56…

MALICIOUS

PDF

84.0 KB Created: 2021-09-03 06:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: f71f6efff8ec9b8cdc764466a654088a SHA-1: 4c067e16c948b4f5ccc8e17051c420a7988e6398 SHA-256: ca4054b8d3a15d5660b2cd8abb0404e0c7bebd2980ead7223ecc991cbe7b14bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/89e436171fd5cc41993925c30dc88c27/84556427474.pdf In PDF document text
    • http://nonstopsushi.com/uploads/files/44463321739.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfdf4140c---22605183169.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/borifixa.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/wiluziwuzozu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/fd45c8369f1306a1fe46577847d6394d/47754013841.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/d8bad822971c72e0fc6a66ed95d2c220/47484336416.pdfIn PDF document text
    • http://18554080.com/userfiles/file/sadumajadakubomopiwa.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113921c801db---18266277736.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c034b28ff6---populedamij.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608764ba10646---pupokavaluta.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/74292258152.pdfIn PDF document text
    • http://devison-matras.com/upload/file/savovor.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/m2deoh6fd82gie2fkoq1oil8cv/62652749265.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a913eb7ea26---zajevarofejofojoxurifekix.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38793bd93---sibevebovawuwijijesereko.pdfIn PDF document text
    • http://dnepropress.net/files/file/5168821851.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/148a58e1cc421bde226829ad4014b03d/wejikakiloxukedisilabukuz.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963980e4b9b---zinivenoxoz.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/lojumakabimifoburilewupas.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f9dabc95926---83638924927.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/kilugunelivigudepaf.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/gokk8fffd8147q8feibuij65h3/90860612260.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/39643384203.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d365a896b48d822fe83e4c33c4b7f496/nikivobatojuwoxitujure.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aff99871ab9---godufowuparopemevo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=football+rules+in+urdu+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_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 20784 bytes
SHA-256: cbf92ab1090b6f3998bea0ee6b6da8e39f32ba1495f8c4d97bd39cf61c92e4c6
font_01_sfnt_off000111f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 10708 bytes
SHA-256: 8fbd989ce45b41401b1a6980484a46f6bff20d97e09b1cc52c429c40ffceee3d
font_02_sfnt_off00012a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.