Malicious PDF — malware analysis report

Static analysis result for SHA-256 575ef41d33a7efb7…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 08:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bdbf3129d15b48543260d5f10b987413 SHA-1: 00b93c4f388f13312aaab193cda9556f8c70456a SHA-256: 575ef41d33a7efb79987c988973fb71ffc5158e2f57e13adfb87130c6bca7ce6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised WordPress upload storage. The presence of numerous URLs, including one hosted on 'thebetterinsurance.com' via a compromised upload directory, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/52e147ae1505b148221ac438ce7a9d4a/45397017544.pdf In PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/516fb0eb85140ece2e122f205dac6ce4/87148603947.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/58971928252.pdfIn PDF document text
    • http://tipiland.net/upload/file/kumiwugudogoribevipo.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/13312574855.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/remoafgo9opfj7le13behbev1n/12716119710.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b3ccb8f2c---lofajafu.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/64145681846.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/92112608778.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/vakatidavuwogazukasebaku.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/21117523454.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/45u4ep56mo2ghqv4rlajk7ctvc/gizir.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2204822b---fogutolivajewoxojowak.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d0b3c2119---puxojubuvagikofupun.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8e8c08c93c215a3fa292ba6b8c96079f/19898271799.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/48042229328.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/05e5e67c4615b590f5c593bc2a15697d/45401811141.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/jiter.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbc4d11bf4---79166443110.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/59994279834.pdfIn PDF document text
    • https://go2germany.ru/files/file/fijixoganuxob.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/818fbcefc2ea26911898ef7f1b9dba09/16948423552.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210524063235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rode+hill+fisheryPDF 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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 18128 bytes
SHA-256: 06ab1cecde5856ded8e54c62d8eb08623812c7ad7348014a8f376118f7ea24be
font_01_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FB 10244 bytes
SHA-256: cc8dbc0b468646115fbf9dba5eec7efa47f387074c9f54559ba4d2ffbfd44a8b

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