Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03d9bf2a6c1fe4b…

MALICIOUS

PDF

89.8 KB Created: 2021-06-15 11:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d4d79ec3658518de2151a42e77e4fb97 SHA-1: 6b661d73958a3a12e44e60860ac4293c3e7ddd2f SHA-256: e03d9bf2a6c1fe4ba20dd8ff3072d3c844304553493acf7f455dc419f07e4e9b
156 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 0.9997

Heuristics 6

  • 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
  • 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://krisoc.ru/uplcv?utm_term=rupban+cinema+gaan PDF link annotation
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608df9c811420---77811948686.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/9cb6b4cbe0e96fb0468941bc7dca8359/38652609612.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/66aff5736c8ae93d535ee2b6cb7f4f8a/67003982180.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/f01a00865d1bade7987946116ece534c/vuxiziderexu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e592d53eee---vijonozusejaxekubev.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8640610e38a83189017e907023ca8861/fatosutirogofafino.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e2c00d452f236bf59c778c33aec62b9/moleladepajirigugis.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/f067fd9541b7ca9c60c5433e8bb722db/29905058437.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b30d18d1473---87345000896.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/930043a56e8b43e90fdf943df7eb219e/80418301394.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f644fdfdac890694cb7c6534d1d173b/95068213580.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/8j5j6fk4qk7edsq1a1lr462uu1/fedidefowusubufenuk.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/q09qs3u26s9im6i5hskht1mbc7/13147586675.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/qod1h966495terei0jf5dh4tme/72538825874.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/c12ea2024a594da702bf199d837c5d6e/nubixewokagepevakebabo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/iapmqv18h3kj6v7pbq4ik9q2b1/rofarum.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/52930580954.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/tonovir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 5096 bytes
SHA-256: 7ac6f9b5f8f613ec2c97634037813982b4e3b31dccb7fe466c4490539cfb4d20
font_01_sfnt_off00011b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B48 6992 bytes
SHA-256: da761bf245e6c2d0256d8068efc7c64cb872fd8d1aa1258d32bcd577fc6841eb
font_02_sfnt_off0001320b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 12380 bytes
SHA-256: 14d26ebf213a5258134d62fd4107684bb47da4280192883c7d9326652cbbc985