Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58417ae81afb0f6…

MALICIOUS

PDF

86.8 KB Created: 2021-08-17 13:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a88f8b52981e9fac7c1b4f6be750ddb SHA-1: 9e2db24118e18ab6d71501ff58bdeae47ee4c4ee SHA-256: e58417ae81afb0f6d7d0dbd5d4b210e2659f4fabab89d73cec984c4cfb5aef14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or conduct phishing. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=what+are+the+different+theories+of+aging+in+psychology PDF link annotation
    • http://mintaialuminum.com/d/files/6553583184.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f3501ca6---45749429413.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9028ec462---31630093302.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c30b752d2a10f21bdf95bf0f8f222cd3/fiwepopigelaz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096455f38141---99750530415.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/42107880396.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/puwakof.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/tewimumaxerafegevodid.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/52858936339.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/wujipegasuvarivatiwe.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/26324078864.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/mizumitodilatekuwutaxof.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/79590502681.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/qaocsr2nfqsabcauujupgelhcm/ripopuxalapiludawugab.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a0914ebf45---59308016851.pdfIn PDF document text
    • http://amdind.com/userfiles/file/36349766812.pdfIn PDF document text
    • http://swiss-ex.com/pelixomo.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/vuzomanevajumexawane.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14cfefb52---pidux.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/somazetup.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/famekodozoxa.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_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D2 17800 bytes
SHA-256: 098c61dcfa10e19bc84eb1c7df7b4c17db5384ff2711291be9fcc5624c7d47e3
font_02_sfnt_off000132b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B2 11004 bytes
SHA-256: 57ac1d475f2eb846ed71c1769990ead91a645cd5d8725342c46a7f9e8d87ea88

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