Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e08fbc9d002ca3…

MALICIOUS

PDF

71.7 KB Created: 2021-09-08 19:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92399d1d9d7460d82280ae04b91c36f3 SHA-1: 0b8a242d9831ed0f18c91a99fcbbb649ef031d8e SHA-256: c2e08fbc9d002ca3aec2c36b4f92a5ccc9cc21a53b888afb3aea5c038611aed6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=portuguese+dictionary+pdf PDF link annotation
    • https://xosobacninh.vn/webroot/img/files/97568089479.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/piviwunerofatezudinav.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/fupoxokewixadosinofit.pdfIn PDF document text
    • http://sdes.in/uploads/46061431886.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/74895091686.pdfIn PDF document text
    • http://pbpharm.com/upload/files/92991758209.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/65720028518.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/kiguvuwemowira.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/lajejuf.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/15115837683.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/norunubelejaxinubaw.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/gesufululov.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/301038187.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/dajuzugigutawamujutoxes.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/kajuta.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/52940078373.pdfIn PDF document text
    • http://irths.com/upload_files/files/fikutix.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/63223624301.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/kanafobosipibogip.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/duwolapelurenikepirub.pdfIn PDF document text
    • https://bfull.ru/uploads/files/9430223415.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/69692882764.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/13675020843.pdfIn PDF document text
    • http://zimmerei-possert.at/98852829915.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_off0000b6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFC 16164 bytes
SHA-256: b9288e4f1994c23d8fa26dca79aed97ca9f08658c77e9f2a69e474d502e6d0b4
font_02_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 10964 bytes
SHA-256: 6c5e34192594702e5b777d807c94e316b600414a7e851fac89bdc140e81def60

Open this report in the interactive analyzer, or submit your own file for analysis.