Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ca1b1b97f0635a…

MALICIOUS

PDF

86.1 KB Created: 2021-08-15 00:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 90830ea516f86fe141745c0bedac1e01 SHA-1: 036530a304f7089b0d18f28fa34547f2400f5675 SHA-256: 46ca1b1b97f0635a27c575c4d2c39aade21a027128db0083bfae95d12f211bad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document functions as a link farm, likely for SEO manipulation or to distribute malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, suggesting the links may lead to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e280abe697c---78767916238.pdf In PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077f009e3764---manujimezaputajidif.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/lqjt6fcfspsldnnudb3vjs1hv2/vuzatik.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/zokuxazipemiwesafetufefij.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/dajixaxawavanosivukuku.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/wabesojesinipetukazinapa.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5a37e9300---rebalasiterejedo.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/c68aanerlnj08ceb161ub9q9nc/16022139866.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/zuzoretibatapojuta.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/6976195899.pdfIn PDF document text
    • http://uco-kampen.com/media/files/2166072022.pdfIn PDF document text
    • https://soechi.net/userfiles/file/61101996399.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/n3hfr7ukpn4enk9m933h4mpdo6/bunegomifujizuraz.pdfIn PDF document text
    • https://aedwea.com/upload/foto/54555986939.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/81678754195.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/2o2s5ai2sd8mc0isur93mn4524/67790313788.pdfIn PDF document text
    • http://prestopc.it/upload/file/fadiwovikatisirodekosi.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/mulowurevosugadegated.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/76615410338.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0421ab706---fidigituwaxax.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/28586069583.pdfIn PDF document text
    • http://talleresjpg.es/img/file/bozemilosapovisurode.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/wosuguveba.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b049d18177---dutaxokezopiribitidisujop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tekken+3+apk+weebly.com+35+mbPDF 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_off0000ebaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 17188 bytes
SHA-256: 726569e9546e7f048e3f8bf905df54c94e193ca2186fba9eda9d9f4ba269ed72
font_01_sfnt_off000118cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 10844 bytes
SHA-256: 5d6bc0d77e8be7f997b477fe716607ae881cb982f0de458e16b180c5b6ee316a

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