Malicious PDF — malware analysis report

Static analysis result for SHA-256 132afd02d319d9a5…

MALICIOUS

PDF

79.9 KB Created: 2021-09-18 15:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9351a88aad32836e695f50636e1615aa SHA-1: e7ff0cb2141798c56498cd51073d93b7dcf7e1da SHA-256: 132afd02d319d9a5b9fb711c942ec8be2f8976739c82c2c3737a48ab2a748392
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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 https://huntic.ru/uplcv?utm_term=prince+of+persia+psp+android PDF link annotation
    • http://acsalma.hu/userfiles/files/fabimekanafulaletarafise.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/aef3ebb4315224fb270f447407945d70/kobizeb.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/pefuje.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/43408731539.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090211514573499.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/20553585001.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/tozuwimolomejotuzavawera.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/20353450287.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/98501888335.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/56009327445.pdfIn PDF document text
    • http://agrihitech.net/media/ftp/file/59056259494.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/83674597586.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/wupaxekap.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/93721513533.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/10669345243.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/35756658905.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/jufelovedepele.pdfIn PDF document text
    • http://grandfiltr.com/files/file/13857736677.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/miwodurerufanuwejolugized.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 18596 bytes
SHA-256: 46b75fefddac2682f9ccffef157d6912127624441f46c0588cc7fcef196508c0
font_01_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 10472 bytes
SHA-256: d40b8c53c6ea70a4522825916ba4cf9e250443371d3b4c9faec99f3316ec3618

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