Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e40097f7c1adc0…

MALICIOUS

PDF

109.7 KB Created: 2021-08-26 13:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6a02c62cd15cb6c8de3c3f66e89ddea9 SHA-1: c38af2e04b611c86f5742a03c28c0813efbf6832 SHA-256: b0e40097f7c1adc06950370a3a58369fd4f449e32807e3de34a2b4052de9e08c
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the intent is to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cafemocion.com/userfiles/file/64996893661.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16075eee622b96---8929227021.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/791853293a92d766a6503fee007ba7f5/nalezufusa.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/8dd942e3ec2168690737fc84d0d48068/nexonitetas.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/23629781615.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/237d76cfa9c8fdea3a825d5ef5f74900/61473326811.pdfIn PDF document text
    • http://daycamhoa.net/upload/UploadFiles/files/76282153743.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/13769236262.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3b49b1812dd27984af9ac399d419d659/32223924796.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/kerunoxekorurukufoteba.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/zofamugexo.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3a2b5af40---tuwakatotelepug.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/duxeguburudalo.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/94471194601.pdfIn PDF document text
    • http://mamam.by/upload/File/file/97808573712.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ef614b39a6437c6c4eee8be74a6bb22b/lonix.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/21lmlnhs68pr8cjc1d3lnp30r7/limidesamuwefo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/b71c0858f647a7b4fac7aba8b80b846d/36808881719.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16108e7a6a53c5---xuvakedema.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/kaxifizegibukudurelago.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/55487971083.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/61687703549.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/89371512260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=grawp+harry+potterPDF 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_off00014b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B88 10180 bytes
SHA-256: 8e6e1091da39b359ac0183de81e23bdf9e915effa5527085cd31881add8d1924
font_01_sfnt_off00016290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16290 17556 bytes
SHA-256: 2db8b6cf79572b53fc95604cc30af8d57a4699c5fec049c40d4744959a6373f2
font_02_sfnt_off00019026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19026 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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