Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cd2c25650b8be3…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 10:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5b35a0e5a2586fa306149d1333d17b41 SHA-1: 9200bbd60eed20b92c27efc2800fbffcc025bcd5 SHA-256: c3cd2c25650b8be3e75906710be9c09cda940056d2f21b3bf9890a79e87ae995
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 compromised WordPress upload directories and other disposable hosting sites. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a high likelihood of malicious intent. The primary goal appears to be directing users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/3496d9a22168b9d52c6e3bbbbb107a5c/gabekajavulasufutilu.pdf In PDF document text
    • http://curry-box-deluxe.de/userfiles/file/54183669914.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8245361b45---nalekezedufafetafiwexe.pdfIn PDF document text
    • http://email-database.info/userfiles/file/dokirorenelav.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32653e1c37---zajezoxawojuzodo.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/95240864428.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b33cc4d3793---34727052673.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/39238535734.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210730_65B051326145F917.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/8aff5986a8593602b7b41e1f31aeea5f/suzuxubilisaberananurumir.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/99220220169.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021061214183170554.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/xulodevojowex.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/7ia091qt3n4hcmfbp5b956ukm4/99079810405.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/nozazu.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/24702262338.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93653259d5---46906309378.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/filuvirav.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/317bc91f4fc18a31b85e8fdf58998ce2/vokadojudalisovoxujujon.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/1vkpevn99ap33asgt8jtg0jbqh/50100862985.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/jemevumuvezilifu.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf375d936---zaliduwipirid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=doubling+and+halving+strategy+worksheetsPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/ligof.pdfIn PDF document text
    • 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_off0000ca14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA14 17416 bytes
SHA-256: 25695e8fb41f1880004b202f549c0bb7f2c25caf8784d3374872a7c7ba490c53
font_01_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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