Malicious PDF — malware analysis report

Static analysis result for SHA-256 214719f68699292e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 08:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30e12badd852530adc0ec20b5ac75357 SHA-1: 53d88d41d22af7fb78255a81c547cb1e80df61c4 SHA-256: 214719f68699292e30cb8dea8b61b84526b9cf0a5ca5870c823f39e283c514fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://sequirk.ie/userfiles/file/81066743188.pdf In PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/supufedowitopozute.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/vexafufin.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210713_210428.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/61537810544.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed48583dbbd---tedotapezu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/70faa9e5ca60efe5dc1dc51714313a22/26759903323.pdfIn PDF document text
    • https://x-software.cz/data/file/64613528087.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/3373766166.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123de79b9fc2---61703202889.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/22208365360.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/28358355190.pdfIn PDF document text
    • http://nature-revive.org/files/file/zarivosarakoseza.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/15764585122.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/22efb68fa8c1c8e31247f12480407ef2/71928338651.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/57132636338.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/d91a7615119bdbeecc9021b07f46678a/vokavenabalo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b794835bd9---18685362669.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/9865dbd05f8adf3e1f379b04a6518eb8/87078566748.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/29925632685.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0beca2aa36---96118054126.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/mixixal.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/65214838132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=architecting+a+big+data+platform+for+analytics+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 18680 bytes
SHA-256: 3a2ab06dd1e43bcc7477389505c34df8baf6295b5f5f6273dcb934a67122431b
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 11300 bytes
SHA-256: 9419e6564ed0113d359543947a3e14791c8075f2c03818600f072fa0c02eb535
font_02_sfnt_off000122f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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