Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3025b78373d9043…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 22:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d9960cd6d7c4d9219567895d7d55c565 SHA-1: e90477b9ba84e7c0adc3a12c9cbdfbc7c7b5734a SHA-256: b3025b78373d9043c89a48e7332e5fb698d041c9f481d095aba90091dd8b3d4b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites disguised as legitimate content. The presence of external URIs and link farms points towards a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=oster+classic+76+instruction+manual PDF link annotation
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hr0p9ne0vtejgqgj20sjsc40la/nises.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/86894490775.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/21238090050.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/20689974767.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/dajekinibogaka.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/252a89eb7d58981f9384f6be413c1273/76628655646.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/43271324093.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/15835764583.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d6edc04cf---veditosukapawasepuruwaj.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/kivawezaxujexanofesitu.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/43282361554.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/ruxetor.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051322062431.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/21524252280.pdfIn PDF document text
    • https://lesura.net/userfiles/file/94898059732.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/xosaxinadogebapizom.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/pobokesobafa.pdfIn PDF document text
    • http://redtopmarina.com/clients/7/72/7297c65379f6126c97b8b18e62fd1dd4/File/kasavuguwiniwodumaxalido.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/13b031fd4e2cbe4ee9213dbc7ac59c61/sokowewusigavamabofijuv.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16098c00a40857---34082135130.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/tiwilugaserepu.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8fff7fd8942475af478ecee4288c902b/59303164582.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608825bdbbb64---tiralofupabagefivo.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/texuso.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/butudadumafurux.pdfIn 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://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_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 10732 bytes
SHA-256: ff4f180bf2970d1868c9b60e7b8e1546c26cd8c52f352274432f6405ca9cfad8
font_01_sfnt_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 18068 bytes
SHA-256: 517e4cf48c059ff80e9a88b6124834e172669870440392b578e6ba9e826c0793

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