Malicious PDF — malware analysis report

Static analysis result for SHA-256 272f1b4bf5739197…

MALICIOUS

PDF

81.5 KB Created: 2021-09-01 06:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 042d9aeef16fcf9466cf8ecea8963b3a SHA-1: 7d8bfcd9d0aac757d9bc2da746f24df490082bca SHA-256: 272f1b4bf57391974d90282a2fed021696f73549007c636f115ef1ee800d7775
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a link farm pointing to multiple compromised CMS upload directories, suggesting it is designed to redirect users to malicious or phishing content. The primary purpose appears to be to leverage these links for traffic distribution or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=other+names+for+jellyfish PDF link annotation
    • https://verredistri.fr/xmedia/file/90544291553.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/jdq47o0ta3qck9uiskuktvcg66/zezirilizofobuxaf.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/95740609539.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/12377067639.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16085747baf2c2---kavazipe.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5d481845---paguxoguvejozugega.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/7054179656.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/62041535012.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094505875a98---rifagenogovojukilanuzexo.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/50352989381.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c927dd15cc---koramaduruvidaza.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/47281011372.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/vamewoxotisinatiwi.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/kibosoximirabatuvu.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/ganubudopepotut.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa59876dd4c---vepegapulipideganosuzadot.pdfIn PDF document text
    • http://chineseclothingonline.net/File/87281736988.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/74235482976.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/15750640164.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/69629625546.pdfIn PDF document text
    • https://mihalex.by/files/files/panavodirifakape.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/10595850909.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CE 10748 bytes
SHA-256: bbf70bcebebc1867e1d9287b0b29cd2dca6f33d1e1329921fa6a47ad37ced76b
font_01_sfnt_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 20468 bytes
SHA-256: 2aaf1935fa1cd19af3a847670bcbc8ef45504484913794d223602e95b00487ab
font_02_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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