Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbba8ec2b33e303…

MALICIOUS

PDF

98.4 KB Created: 2021-06-14 00:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fcdb633466101a65f46a6cc22312017c SHA-1: 4aabaaf2af61326352ddd542dba675f9984e7da2 SHA-256: 2bbba8ec2b33e30372f59ad63c1095a6912a4bc5f0e121af03476d242e5b4f73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The presence of 'utm_term' parameters suggests an attempt to track user engagement with potentially malicious content. ClamAV and ML classifiers confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://huntic.ru/uplcv?utm_term=block+damage+champions+raid+shadow+legends PDF link annotation
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855b779b9e6---pututibivewelufiti.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a3540a4d5e1---70096258179.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ot7n9tmb2l48i2hen9c76ibahh/37306875013.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/vewijekewijugiwevugezo.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d5003889d6546a11c6a212d72d2d9ec9/gibigit.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484ca66d89---37672103630.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/e8604376aa29b2ec38c513be1ff4c547/5195725674.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a12b741e---gugekowixetuzunikulok.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/solilazexo.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/sigarovegokesejej.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0d5a026a---36012306083.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093d1fcd4fb5---zojewavelalagunigogegama.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/5cfbff2b15dc73920b93477ffe025be9/lerin.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0a19897f---27690593059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 6084 bytes
SHA-256: ec380d2b1cad161c528aabcda5c106f3f8db8f42d2b537579cb1bb5a17b496d3
font_01_sfnt_off00012299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12299 5692 bytes
SHA-256: 0b98ea699dc57a69502e8a76cbc9bf1613232b1306dd130111e5a4b3c12d71b9
font_02_sfnt_off000135e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E9 15956 bytes
SHA-256: 4a6c7d8ad0d2ecf072c2a9e8b8e6d9e0d0e1d26af521260cd377f6aa330b1d26
font_03_sfnt_off00016689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16689 16192 bytes
SHA-256: 2c7bfa1d9567b73a64088443c8322ad9874f7d441dcf23de5e9781887fcbdb20

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