Malicious PDF — malware analysis report

Static analysis result for SHA-256 037af9397382794a…

MALICIOUS

PDF

82.8 KB Created: 2021-09-08 15:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a8d7eed19b54b7a6c57e46588fa27898 SHA-1: 7486870c2988e49a67001c1cb7448ae9c234b343 SHA-256: 037af9397382794a7410d8e22955d6ecb3351e141ea07b128499667566a42ebf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=poulan+pro+lawn+mower+manual PDF link annotation
    • https://cihangirhotel.com/upload/ckfinder/files/22631035130.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/93316357040.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/5701429666.pdfIn PDF document text
    • http://wjcopy.com/upload/files/75233796705.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/11181610402.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/zinimakulobapapasinekafa.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/36454534581.pdfIn PDF document text
    • http://ruresept.ru/files/file/12072190711.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/zojitebapa.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/nuxisidesakivadopowe.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/83945296976.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a7b62093d54ebd21f855b5eb215b200f/walugamewitimu.pdfIn PDF document text
    • http://scpt.it/userfiles/files/49755229992.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/63646409159.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/e14a975c627b323e279e282d92918078/butepipiwabijaribawug.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/zixagadafimozizotex.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/krulqschs42c3mfda22jm6obd7/tojelivupibiniwis.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161300278e28b0---daxijajedimitob.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/onjd851q5enbnt3apasfk6ak4p/kemeni.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/52942699198.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/gaxasusapifub.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/38288559879.pdfIn PDF document text
    • http://15881588.com/ckupload/files/11407214728.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210902060809.pdfIn 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://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_off0000e052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 17948 bytes
SHA-256: 9a4f8fd7630608f10c72c4c549d2270aea3a47e00362d896e6dc7e17766a9059
font_01_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12693 10240 bytes
SHA-256: 638e203b3818e78156888fe2fde2aec0cf36cceb8bf23d0e717edbadfc5da025

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