Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9daa04fca4f2b1…

MALICIOUS

PDF

88.6 KB Created: 2021-06-08 17:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb580cc234b81f0692202c3ed50789de SHA-1: c4517ec5dd868019a90bcc12063a1c41bac565f7 SHA-256: 9e9daa04fca4f2b159f522089cce4c5b8fdf6629e902e7ec6b03ac83d1ec7caf
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=how+to+resolve+conflict+interview+answer PDF link annotation
    • http://afghansolar.com/userfiles/file/45578877619.pdfIn PDF document text
    • http://slsnn.ru/content/file/2408134110.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/443db33c550e42a0c05b5c62890f39ee/72221843512.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/h0jvne87um0ua65rtu0b2962gv/71075490707.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c840a5fde---48228738923.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5f42263fe8830fcbc1b73ee93ae8fe7c/92156127219.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f5a145dab---zebajezakes.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/53778141509.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0e57118a---70424044257.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210531_800264E1CF7D3845.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/89923728890.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/9367930631.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075641b5b96a---88434831563.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2ed1b8fc1dd5e1f530153310e67ada6/59633858205.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9cfa10109---56895556404.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d19092706---tadamek.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/45d00651768fdf19d7ad7c33056a3bd1/93449392736.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001210f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 4776 bytes
SHA-256: c063fd8dc4ba841d74e645fb04dd80ea6dc2c7f2c2a990208752904c6512fe26
font_01_sfnt_off00013165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 10652 bytes
SHA-256: 102fb3df2b5744689de3ca49b6d100f9881ba960445147a0f728fd2a1d6a3e49
font_02_sfnt_off00015591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15591 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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