Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c22c0b4fbbf457…

MALICIOUS

PDF

87.3 KB Created: 2021-07-25 02:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e6fe34b3684386f3b0e9ecd5868b5fd5 SHA-1: a2863c23e94e13944c2f7f5dbc45cd90326f1ebe SHA-256: c3c22c0b4fbbf457f30dc8c926deb332c4e2d89550903481b6363f0fc2603e1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sarica.com.tr/ckfinder/userfiles/files/9165465898.pdf In PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/05575b91fa11b173922c3255fa0edb07/18007119219.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f0bb19b89---getotuzasugajigefokasebiz.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/77335507874.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/67587096281.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be2def896ae---ramazopegulen.pdfIn PDF document text
    • https://amblamy.ee/upload/file/97217406783.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/81126583712.pdfIn PDF document text
    • https://micsys.in/userfiles/file/pitejovelamusituwege.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/90277431410.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/d71db6b418c48685fad255a2834432fc/sevapu.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f327c470d7---lekanup.pdfIn PDF document text
    • http://cga82.com/admin/File/xulawebumisamode.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-13/20210713031429567042.pdfIn PDF document text
    • http://parentini.it/userfiles/files/vevoniresojenagoveji.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/73257294051.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/59925760475.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/fdc3e37506732344edd3cf9123bc731b/23800573964.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e880de5cbae---ruledub.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/nifimukipiwizalad.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefeceaaae---82006139494.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/turasevusagoximebe.pdfIn PDF document text
    • http://absigorta.com/E/file/volome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=project+management+dashboard+excel+template+free+downloadPDF 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_off0000ee4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10663 11436 bytes
SHA-256: e449d06b1f9e917276e49e522cca8824a39d406c70e0efbffef75f88c62b00aa
font_02_sfnt_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 17500 bytes
SHA-256: d5bcc06a1f220f4aa1fd78c72c7d9258c3d042b02a3d9407436acceac396a46c

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