Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7658cae8a835b80…

MALICIOUS

PDF

67.0 KB Created: 2021-06-25 02:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e4d6f357bb5555542f8362b82052dce2 SHA-1: 9b52532778b9eafd2b9303bde8b1d8457526bdaf SHA-256: e7658cae8a835b80abc198450e03000b71bd12ed93da1d1569eb6b7b312ac8dc
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=tonal+harmony+7th+edition+workbook+answers PDF link annotation
    • http://laiyi-art.com/userfiles/file/50206239245.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/78578600415.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a397ce6e15---53908227342.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/38348574462.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/kewawilojadegenepefasimum.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f6a1771d---moruzufasaluri.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f4c02ee2d453b514afb0a27a873940cd/58897560365.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/cddc2bfddeaa346fd7a5d96719370dc6/22414851460.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/8014020135.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/va1tflsc5aasg0njp5k4r77266/wofebovomawolegekoso.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/kezivebodawakug.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/29963656523.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/38745092887.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba5ab3e582---70605526882.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9863a8aaad---dododa.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/lobaluwenopujimamasid.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/5139987954.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EC 5492 bytes
SHA-256: 0b8dea22e86508882948784f9dadea12b4891167d095ad9c8d2f93a51ebdd58a
font_01_sfnt_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 11056 bytes
SHA-256: 5163a642c5ab3c6c6a771b4bafc1ec6a223d1064d4d87aadac0ae4e1907ceae1

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