Malicious PDF — malware analysis report

Static analysis result for SHA-256 3375d9adec8fa107…

MALICIOUS

PDF

80.7 KB Created: 2021-09-11 15:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29e4b10b8c4b59cc1a12a3dd496ea04d SHA-1: 08dedea3a3fd0106f5f686ef9133e73169dd3c44 SHA-256: 3375d9adec8fa107950d3918e1ec7aa0cc42c4ae5f5f9d7c1c33dacb3e3bfac9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm on disposable hosting, and numerous external URIs were extracted, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample, but the presence of many external links points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=solar+smash+2+download
    • http://train-in-japan.com/images/blog/file/39388046859.pdf
    • https://dallaslandscapedesign.com/media/files/50612046567.pdf
    • http://www.anjhimayath.com/upload/file/37590565730.pdf
    • http://lexxyin.net/files/fckeditor/file/xiluzuvakejexibuvodafe.pdf
    • http://iweldbot.com/ckfinder/pho/files/kofutipok.pdf
    • http://jcnjl.com/userfiles/files/donamegizotufolif.pdf
    • http://topp.pl/_topp/file/9115480151.pdf
    • https://invision.buzyhub.com/files/2945426326.pdf
    • http://www.nena-artspace.com/ckfinder/userfiles/files/rediguwozilowenaxux.pdf
    • http://medical-1669.com/userfiles/files/tibilimif.pdf
    • https://artistprasanna.com/userfiles/file/muveviba.pdf
    • https://k31szmq42-nu28.com/contents/files/rubak.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/soxuridig.pdf
    • http://everestlodgelukla.com/userfiles/file/samef.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fb39167b1---15876061941.pdf
    • http://creatinglifeoptions.com/userfiles/files/88423547765.pdf
    • https://factorysales.com/userfiles/files/19771724772.pdf
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/87632637947.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/b893debc65758638f481b6452d3086ed/85311116855.pdf
    • http://barefoot.pl/userfiles/file/96420689193.pdf
    • http://agedwedfjtj.pretty-match.com/upload/files/foneborexaf.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/36311274944.pdf
    • https://xinpayflow.com/ckfinder/userfiles/files/32811522705.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ac.bin
f0bcca1fab8709dec16ff0fc9049f17987079525f526f89376bb5fc4007b99f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 17980 bytes
font_01_sfnt_off000105b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B2 16792 bytes
font_02_sfnt_off00011dc9.bin
187a311f75732e97c2d9f387869855314a5cc768c051455212e88617f05f8b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 10472 bytes

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