Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d4492d4d02461f…

MALICIOUS

PDF

75.4 KB Created: 2021-09-20 10:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 97d12a85cc01b09b2783238b32e87ef3 SHA-1: 6a7c8943f53ad1a327175ad5d2dd5d0116c868d3 SHA-256: 73d4492d4d02461fb1e4bebedd77f6d623119198a0a749384c79828c612cd7ee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. This suggests a phishing or redirection attempt, likely to lure users to malicious content or further stages of an attack. The ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier clean score 0.2081

Heuristics 5

  • 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
  • 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://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/dd5fa627107be6d5887179d66efdfbb8/80770501984.pdf In PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/82590030692.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/mutapubosafafujofebodag.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631560269_f0b44f2c9b.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/pebumetuf.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/26166993806.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/34423520655.pdfIn PDF document text
    • https://kermanrooz.com/img/files/favutotodogipazede.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/73346323144.pdfIn PDF document text
    • http://vaithun.net/upload/files/85129367563.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/33418600057.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/zamusomotiposozufe.pdfIn PDF document text
    • http://kco.su/userfiles/file/65880346923.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140e8d9d253e---bapuwisod.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea078ac4a7---zovelitagigizesolukonev.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/gukugafasosopevovutubonaz.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210910_DD246AB4F84C0AF0.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca92428c7---zuzovubevajasijumozokene.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/vosajogimeronubu.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/jejonevakuliraledavurilu.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/68320881233.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/pc3iall8t1k3k1vn057gql818f/wusudenopamelimoruweta.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/vakixuwawimorepirawaza.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/54662171052.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/18590676296.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613995a838124---suneg.pdfIn PDF document text
    • http://totoumi.jp/upload/file/22705960385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=now+player+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 18700 bytes
SHA-256: ffc7869094599ee948f9b67a8f38181906bc0c48fe7724a32a056c466383e63d
font_01_sfnt_off000116fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FA 10052 bytes
SHA-256: 1eaa564f9d643b1fba5dce1c673626b20b9d7b10be34dc60398b0012e0ecc978