Malicious PDF — malware analysis report

Static analysis result for SHA-256 342f72132683c9bd…

MALICIOUS

PDF

78.8 KB Created: 2021-09-05 09:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b19f74e4975a3d7a3637dab4c2aad0f0 SHA-1: 7139887efb442250375c1139b069da3b4a991eb9 SHA-256: 342f72132683c9bded80c11b8d62e18cfc463350d54a5e3e0d1ae42854c7e858
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://ecohort.biz/userfiles/files/fezevepeboxurugusejulobax.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ltjpf8pue6feo436s73jaav2h0/durofojebo.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/76390bc82acb30f7a678f9ded3529abb/79158522678.pdfIn PDF document text
    • https://wildnaturetravel.com/File/71081499082.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/99377491114.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/lalejilejukenoxebe.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210508005627.pdfIn PDF document text
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/10151890391.pdfIn PDF document text
    • http://www.buildonhope.org/file/23996582394.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/h1a47rjf6hvnnrgdjr1tc5p2c5/55596957036.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1610b5b71c7107---5349600199.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/v1793n337t3pjb1iau3s3j0uch/68891522839.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/44986618499.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/81263233712.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/j6m0umjdelcot9qc6soc3sqruf/linodunibutofovenopexox.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/32563727443.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/vjb97ij7jkbmtqg8thq95s88ol/tadonizelekidu.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/94567271304.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/58594699365.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/26519117632.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/83948001241.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/90579228804.pdfIn PDF document text
    • http://ipublicity.cz/data/file/fodafemekokalanuvanezuw.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160db0a8f9be5e---31315315407.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088019f1be36---43701838784.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/tidugamare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=computer+system+organization+with+assembly+language+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 11476 bytes
SHA-256: efcebd38a013eee2f4346bca6d1a2b5e21c3b0057e39c2704d67ee97b8c3ec79
font_02_sfnt_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 17324 bytes
SHA-256: aadf27b9ed2193396c93602c7a54b3a904f7c7017fe154e5b40633fce83cbf7d

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