Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dcbd4f1c51bcfb…

MALICIOUS

PDF

84.6 KB Created: 2021-08-24 07:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79f93f2efe793289dc480bb10b167579 SHA-1: a1b3d99095b4b6432ae0ddd7058291ea69ffda18 SHA-256: e2dcbd4f1c51bcfb1645bdd305d903de905f96c5d5857c76dea4e4e8c98d4373
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The presence of multiple unknown reputation URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/2t871mranneq8u97518cb9m28k/88791331283.pdf In PDF document text
    • http://xiaohecollege.com/d/files/29434128693.pdfIn PDF document text
    • https://nada70.org/userfiles/file/67588446020.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f773be46e6---88034498275.pdfIn PDF document text
    • https://promise-land.com/upload/file/gasidu.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/94906910275.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/9cab7448c8763696c1b2cb10a89bbf93/93134447556.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/45749976972.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/2735b8f797721bb07e5daf0c24a13aa8/65776245399.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/202055e5cfb8bc689f11b00900a79588/babalimutul.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/43221570332.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/44089874274.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b4b481d7a5f3773631c56c30d2868db6/70157382277.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/36088869958.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d8fc2f6edc03ac68aa53cc0a912049c6/patilaxa.pdfIn PDF document text
    • http://agavietnam.com/img/files/wapozujibomet.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/9147494732.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/xikitekorelanubup.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/12626603418.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f098321ff4---senowabebagisemesojol.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa896737b5f---56792270626.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/81502044356.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1ababb5dc---96604282303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sturgis+2021+motorcycle+rallyPDF 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_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 11052 bytes
SHA-256: fb4202670ddd77f3f1e23d36fc88913286b10051f103dfdd674ef5812f0a8e34
font_02_sfnt_off00011870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11870 17064 bytes
SHA-256: 76229767c1bf70aa810097a03a2bfd7275c8871ecb2c7b990ded947b92946907

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