Malicious PDF — malware analysis report

Static analysis result for SHA-256 198d5b5dd474da18…

MALICIOUS

PDF

73.4 KB Created: 2021-09-27 07:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ce73c7c384865ab557336d5f706e7e39 SHA-1: 48ad81a03effa31a994fa468f8d673df3a46011d SHA-256: 198d5b5dd474da183ee3c33700b0f67b52efc3ece05f3a7bd3a97722b28df7fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. Heuristics indicate it's a link farm and ClamAV detected it as a phishing trojan. The ML classifier also flagged it with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=epona%27s+song+ocarina+tabs PDF link annotation
    • http://ametansk.ru/uploads2/38056168962.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/66544879945.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0457bb183---76015244385.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/lemufex.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/devokaxalopumekerako.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/zuwaniduweserikivex.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/zozobijatitubumozebesa.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/sonatazuwi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/evuur9r5d838qqi2mjjmnsb7hp/puxomekerasinuratogas.pdfIn PDF document text
    • http://web5gstore.com/Files/files/bafofesokuramedusilo.pdfIn PDF document text
    • http://boldogelet.hu/media/nujogowab.pdfIn PDF document text
    • http://casms.org/atts/news-files/file/jirer.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613739bec060b---23847457458.pdfIn PDF document text
    • https://kratky.eu/files/file/levuvabopafemejil.pdfIn PDF document text
    • http://sivam.pl/files/file/tiwivozabe.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1hp062jggm3ke189stbblccdn5/kinaworakumidepujil.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/59148312536.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/28323934481.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/kedijizevaluz.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a3a05523cc35a6464b993bb9845801ac/xuxibupemamoja.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/57129829045.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-25/20210925112722816474.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148858c7b258---jovizabujakanifaxu.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/7566252535.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/9191910920.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_off0000ba5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD271 17376 bytes
SHA-256: beac6cbed8e7fb87343e2afdaf8cf6bda0aecea33f765726ce4541d0564d33ea
font_02_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 10528 bytes
SHA-256: 9a3e2b878ea44eb85ccbb41e367ded5734b099ea2c0a16fef175d22ab0e95740

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