Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a01eda00aa40b7e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 19:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 99cb7512d119cc2ba7e341f113965ab2 SHA-1: 28f6b329c0cd936bee413eefa8c6f6ca7756586a SHA-256: 9a01eda00aa40b7e40bd36fb23ca6923402b3df29f71afedb46ff6110ca0fd92
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cayxaotamphan.net/userfiles/image/file/boxifaferodize.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1bc719f85---kutaposinem.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/ladasigirinuf.pdfIn PDF document text
    • http://www.bandungmesin.com/file/74842260373.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/33001478467.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/fde573ef3b4a3707378741306960b5bc/87911231178.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/53821944938.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/15804991407.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/934c190b8584b7179acce17288cc7797/zejanaxudomemujotu.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c7423caa7b2b2a4cd6cbf44e937b7f07/69714381030.pdfIn PDF document text
    • http://bscartridge.com/pic/pomefipoxeguzabugi.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/rusevifepibifopuduxebol.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/maguganeziwuresubolaz.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f46df6005dd12ca2ee09e0a4e12687c5/23597604544.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2aca37cd7---veboxilipizep.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/56552793064.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5c15ebb3---rakikila.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a82483a8836---gawesijowalazumukipumij.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf113c04004---xonitulajibala.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/2t7d25eveih3neb4m06akhf753/16963427720.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/10280363826.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/zatav.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/3550960146.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/e5b19007a23b105bb76b59b57760b217/vufurigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=geography+3+bully+answersPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e8c00f966245477b14dd277daca2240a/86749358237.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_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 17304 bytes
SHA-256: 96f895f5084601dcf5054cdbe2bdd58482dd95e0f69a4673870dee558b184705
font_02_sfnt_off0001314a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314A 10992 bytes
SHA-256: 3e765757de64d6cd554fca4fa2ac54194dfcab076c8cfafe20af9b4f7d6bc866

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