Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56dbf00395d2d5d…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 22:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6414988787163cbd45de063073519f99 SHA-1: 289e22232276a0d0aeee07277a83a42b0f57f698 SHA-256: f56dbf00395d2d5d0f2bd88c7c41c88f06ad7cb96fb2b1e5ec357e300f8e3da3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious content or phishing sites. The embedded JavaScript is a common method for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=inver+grove+brewing PDF link annotation
    • http://bindashnews.com/userfiles/file/roguzonanokakugo.pdfIn PDF document text
    • http://metallpress.ru/files/duwig.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73dbc2cdf---15012115834.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607808f23a1b1---31203438227.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/379885f5169c7ebe6f5f2b16e65ae157/53028987619.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/04cf712f12b74467a11783c8a1257e1e/25457347871.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/09e74c7a04a2bc6ee5bdc9990f82ad2d/pelixawarumitugubesikidom.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/28907908432.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/7f69c4fafc8c0652d358e6c6021e1795/1189377231.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/12989088431.pdfIn PDF document text
    • http://arablift.net/userfiles/file/49071940635.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160778069281b4---tarodimamojo.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/10693499662.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/30953433248.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/ritekosoluwubufi.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/dawagisorot.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e46c7b361cf34cc47eeb228ea70a8181/neluladafuso.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/66506692658.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/27938242272.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/kajumanukovidolawejip.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/24237291194.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/83d80c30025f0b20be06e40951a3175e/wabanifemomipaterekopa.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815ae4f2e92---30552625711.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_off0000d553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD553 17484 bytes
SHA-256: 3e2325c981e8fc31db724164539e5630274c3b6b0f3e47c89bbd32c07f58547a
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 10052 bytes
SHA-256: 83b9e278665a3639364cbce9faee13eb7c93b9334ec3e58802f199de80760b45
font_02_sfnt_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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