Malicious PDF — malware analysis report

Static analysis result for SHA-256 450a01d30a31b71c…

MALICIOUS

PDF

77.4 KB Created: 2021-06-19 10:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1e11877079750771267d7611986d25d1 SHA-1: 02cf43577efcaa1b801059fc8d74351c9ebbfd5d SHA-256: 450a01d30a31b71cd9412b4e3e4c24d02b12b5b1c49accb476adbb9436f9a870
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crewmak.ru/uplcv?utm_term=fur+elise+piano+letters+both+hands PDF link annotation
    • http://aliglobshop.com/userfiles/file/87744138256.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc36e5ca8c---718227699.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb5233ec4---wijazilegogoti.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/6e4f81251b60e391e9a4864239346117/xavosufujovodotutexare.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d1dac899---3786869578.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/wesekokebiliv.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/39390264917.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/pizulanipawarenoso.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i7ts1n68f0s97ouees2rh58pr2/jafupiverasowipajuzew.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/34488018023.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f79e509c4---50789492100.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6b5e0c09fe44ccdc7d460664184bb513/20208277844.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/30631377970.pdfIn PDF document text
    • http://sns.hu/_user/file/68205589504.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c54f992a9b5---kisod.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/74293353872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC571 5024 bytes
SHA-256: 8f6c161fdb7d7f211a839926565d2041eb5c4b3d7f485667098a87dd29b7bc11
font_01_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 11292 bytes
SHA-256: 3b010e719c8cf89863cca01f4adf8260fa04497f4ec26c127e4cafb0402b5c41
font_03_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12
font_04_sfnt_off000119ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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