Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d2fafdac1fa28a…

MALICIOUS

PDF

81.5 KB Created: 2021-07-31 00:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6cc38522c2afb2b934f15206dc5feaf9 SHA-1: 601a9901c2136c2688da262ebdd5bb8036044fa1 SHA-256: e3d2fafdac1fa28adbfdb260db9bcf6d6fe56761d93a9da4d3d7718924f69b62
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 and ClamAV as malicious, specifically as a phishing or trojan distribution attempt. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://irlanc.ru/uplcv?utm_term=how+to+install+android+auto+in+hyundai+creta PDF link annotation
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b76944469---balukajonafeli.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/76212245551.pdfIn PDF document text
    • http://valeneighbors.com/userimages/nolutuvolaretekanabolefa.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/lozozidinubaragemed.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0b96fd84b096637b597c14ff13e195b4/95826407153.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nfu8fee1a027r3fkgngqm9e440/xozika.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/42506896252.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca16822033---48637546767.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/7515665732.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/jobozi.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/sefugazilijike.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/dobemaguwigula.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/25084619614.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/pewaji.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/xifikugaxurar.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e09b66b96a---99673778827.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160717fdf6355b---nusala.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/94139732679.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/26778136176.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/31g7fsmj3gh76o0u19ot4tv392/61498043712.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/27530919165.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2c02028b---tetiwixikasatekoko.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_off0000da06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA06 17204 bytes
SHA-256: bec493bfc2268bfb74480088e89c981143c9b28d2f3fff4faf1054da6edb603f
font_01_sfnt_off000106ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 10760 bytes
SHA-256: 08e8d548f6aec266d3850c6c0751062854eb2f07d14bb3be2e1549a0b9926c68

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