Malicious PDF — malware analysis report

Static analysis result for SHA-256 6588236e74917254…

MALICIOUS

PDF

75.4 KB Created: 2021-09-10 02:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a6fda5ae48428042e38121cc680a1fc SHA-1: f5324eeceef4aa4416d817c1382aaea83b2dc67c SHA-256: 6588236e74917254e1a3bff99e4be6d2cde6c496686de67e4190416e50c11d7a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, flagged by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://studioagm.it/userfiles/files/87023178939.pdf In PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/65701081512.pdfIn PDF document text
    • https://websbag.com/uploads/files/72736959590.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/nudikofiroweveka.pdfIn PDF document text
    • https://kawanmto.com/contents/files/gesotejitigeguseta.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/rivitabu.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210902003310.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/11448508308.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613203331e64e---natopebisegonuzoveki.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/52179487328.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/96288626064.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/devosanegatokobopizagif.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/rebetazorasop.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/xezanofuvuguzujarigelik.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5c21148d7---girikad.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/5274611538.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/mopojozadikozojarokakepad.pdfIn PDF document text
    • http://chinahongji.com/d/files/2644597607.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/rijago.pdfIn PDF document text
    • http://fxmeat.com/upload/file/2f0d189eaa741827b4011104937d0fab.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/90582737294.pdfIn PDF document text
    • https://teater77.nl/userfiles/file/wurisuwuzulobabexifinegim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bigger+jekalyn+carr+lyricsPDF 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_off0000c2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 17520 bytes
SHA-256: 9a764789daea1a7f63abd3cd5bd06c462dc4dd99383eaf3e4d12aa7064c245f8
font_02_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 10576 bytes
SHA-256: ecdf5d11f950f41427d7587fc7986386c79798f85bbe73af674a5f75aa1db0c3

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