Malicious PDF — malware analysis report

Static analysis result for SHA-256 4712a625975d0545…

MALICIOUS

PDF

90.3 KB Created: 2021-07-28 08:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af418ad7acb50456a7aad274b94ad63b SHA-1: 26370d07444a7257c454f54995dcfc0ff0bc9766 SHA-256: 4712a625975d054558064e059d23fb9f1a7bd99f5ced0ed7097f46d6a6e14855
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://groupementpecheduloir.com/ckfinder/userfiles/files/ziberazezenafubuzola.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160941e2ddbe7f---ranaxubesidotakores.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af2409520ed---geridesozimefodugofikeda.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/26163402865.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a613cec982eeaff7bb76c342f67e775b/zobujasapunisagiponoxaxow.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/82604594676.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021052718255873499.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a4ec118d7500a9085ba135d30321d0ad/bipovapobuge.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/robovusokimina.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c3cc2bcb---koxojibegerizovur.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf8a48386---67833965490.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/kimusazisasetetanamexet.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770c0037294---paweku.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/2035026583.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a457960086a---74344210419.pdfIn PDF document text
    • http://livilgirls.com/files/tovuxodawajab.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/98078369452.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/81mnpic5lgd95ec1e24sj3vit6/83561718338.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021072414020341.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/43437637826.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/sifowuz.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/jixubariduwawesisaloviso.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887928c4a9b---pitolusuxilalinad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=barron%27s+gre+word+list+with+pictures+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 17508 bytes
SHA-256: 026eb241ef291fa33ef8240f7522a5f1dce0044431e9acf8aa98a7d34fe19e4d
font_01_sfnt_off000112f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F9 11172 bytes
SHA-256: 0e9560d42c9b11ffa5c30c061e0d507b01dfb039c6b412be023a73a184306166
font_02_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_03_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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