Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a0f0727051448d…

MALICIOUS

PDF

96.2 KB Created: 2021-06-28 07:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1339b72e4fb2dcf75327da5b2a085863 SHA-1: bf846d4acffab67c5ea2d19f8d323482fe507d1a SHA-256: 64a0f0727051448d627efb39a3fcaa8e93df284acc3401525e109d65afcf5937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1aab870bddd987f422dc0fcc871a305f/26886706204.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607077c15ad7b---32894025897.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/f7ac45e05bb78136ab9f297e0f786203/25420925121.pdf
    • http://yilip.net/userData/board/file/63321555401.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079d7b5f1739---goxarilolimul.pdf
    • http://alpinedelhi.com/userfiles/files/siliferuzulifat.pdf
    • https://hzautomatisering.nl/userfiles/file/97340732100.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160809ad2080aa---moluxapotunavofujurax.pdf
    • http://www.bash.cl/media/file/bovirovana.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e76674802deca143d365ab12a7a65f48/51900046638.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/af70458cb8f67a5b9c83aa4a6d4a6115/gixowitoxugutibapori.pdf
    • http://fatamorgana.fr/uploads/assets/file/gavurexufe.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/rediloxewibusudinal.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eaca9da5---74490569716.pdf
    • http://medica-eg.com/userfiles/file/24995698767.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ce38d0461---kimudubuzim.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/173377d08f629c227f73f58c421e89e3/32924724894.pdf
    • http://dientrotiendathc.com/media/ftp/file/2969998096.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160afe71c4f11a---xawoboveretopufewiwavig.pdf
    • https://tort-art.ru/userfiles/file/38217233353.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a596d023132---fokanivirukijobewat.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797a4c7635c---97319920841.pdf
    • http://nappsa.org/userfiles/file/dadar.pdf
    • http://cfacgroup.com/uploads/FCK_files/file/sesagojakexisanaxipagadar.pdf
    • http://lezeckastenakosice.sk/upload/files/23498770271.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=swot+analysis+for+bakeshop
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011255.bin
333a96c9ea653203a3071a3c6118ccabaf408ca0b27a586fbd7d72e8b426e5ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x11255 18152 bytes
font_01_sfnt_off000141db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141DB 16792 bytes
font_02_sfnt_off000159f2.bin
81b0b93e3532558a767c9f019ac499b09db48a4889d7afc15169214d9416e8e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x159F2 10960 bytes