Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e5b7da15a1effb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 10:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 843363d8cf621570244494675939eb5d SHA-1: 0df83c55692db11bb6e18370963aa2570a987e92 SHA-256: c6e5b7da15a1effb1286767289244cc30103f0f5790104d89f7de7ab0ad0ae20
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior. While no scripts were directly extracted, the nature of the URLs and the ML classification point towards malicious intent, likely to trick users into downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://drafthe.ru/uplcv?utm_term=dream+league+soccer+2020+apk+mod+download PDF link annotation
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d98e639a13---20136971908.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/vuwam.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/38488197220.pdfIn PDF document text
    • http://talesma.com/E/file/direre.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/lolaku.pdfIn PDF document text
    • http://status.cz/UserFiles/File/nosixoki.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/29123783780.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/roxekimejeze.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/jujokekekavajuxomewo.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/nufugofubelerufodugog.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/jizixokadexal.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/salixowis.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/jamuniluxusewibade.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/juxuv.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/532989121.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/3701591045.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/17190702873.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/86027673907.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/lireribuxemavakedivafu.pdfIn PDF document text
    • http://watch62.ru/files/files/digosibubugomopezudotafa.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/lewidofud.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/17418229638.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/fazusagububexerewur.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_off0000d4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AE 11188 bytes
SHA-256: f1431d3070b2cea80699e9171635a267f251058b489121e9008a1c51a45f4b14
font_01_sfnt_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 17060 bytes
SHA-256: ec09f39045c9de4fdd253e4e932662481ddac2068f9e0a332e7285cf37faee55
font_02_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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