Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2413d43eb5bda73…

MALICIOUS

PDF

70.6 KB Created: 2021-09-04 17:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a181fde96c228ed325e20f487c9f7d6 SHA-1: eed43680c8d244538d3a98cc23272462cb15c06e SHA-256: f2413d43eb5bda735323ca4dabda6662c0778cf0015c9f00454cd806b4ab772e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to various websites, some of which are hosted on compromised CMS upload storage. This suggests a phishing or malware distribution scheme, where users are lured to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/961b92b5bb6ea3e717f021e7c7d93236/61750247200.pdf In PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607082f8c384f---98963970799.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5fd8e1581---zejop.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46186031557.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/nng7vk6akfa04plf24be5ggmm0/1176318312.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210719200100_uwpxml.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/pagijipexifaxawakib.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/8267734396.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32437d1501---wuweloruvaregamap.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/lizuvapubugisudubagoga.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8110c2f19---84779085298.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f67a003e4db---remugavag.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec71e0dcac---29552187436.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/4e0a901fa2cd007bc8bc0d278926e7ae/93647606447.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075a9f09c427---nitegavaviwijewarepebiviz.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/53766390068.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/fesiserinedosutidezulijew.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/rujiwirosek.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202107180520448177.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/684549af743b41e57cb98eda430f6a39/jubipewurud.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c27cc89899a4e55751a47802d4e96f4f/82976001079.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4a171a6be---36260825804.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/vopuvisonimajaso.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/doruwakipevamanawewi.pdfIn PDF document text
    • http://blueyee.com/upload/file/230356289956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=autoclave+procedure+pdfPDF 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_off0000b8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A9 14640 bytes
SHA-256: 8b64413a71d42fe8a833fe59899e0159efc02163cad9df2d8e2496d9beeb3bf6
font_01_sfnt_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF525 10396 bytes
SHA-256: f12a8be88b2062905d626c52e6a46629d475d26b23319dfc4ba56c39099a020e

Open this report in the interactive analyzer, or submit your own file for analysis.