Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbc962bc87e02b9…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 13:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 52e81f522e2db4e38ca72dc61f6feeed SHA-1: 1a61b7ebe32be0934d5024938739ff034b05e112 SHA-256: 1dbc962bc87e02b937f0537dbc57f790d64fdbc84ae9304f19847e2e9d52c0a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous links to external websites, many of which are hosted on disposable domains or appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=iplay+tv+box+apk PDF link annotation
    • http://vit-physio.de/file/85952088750.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/39407810494.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/53986287646.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/98120080115.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/32363792148.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/jilugimosifujexudepuki.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210917095635.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/62698871912.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/87250624314.pdfIn PDF document text
    • https://sledovani.gpshlidac.cz/www/userfiles/files/ruxisagewikidideseferugi.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16140bd14690fa---61541419959.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/58950332172.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/515ccedb3e3688cbe259fc71cf0d0a23/ruwoseg.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/4f1f06de313ffdb090b544d793a937c6/2087809781.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/70752894797.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/15011911433.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/zigogosafasudapiteg.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/xonasilodoneriti.pdfIn PDF document text
    • http://fruitvita.com/files/files/vijadarobejejunovavevu.pdfIn PDF document text
    • http://someteme.com/archivos/_20210916114758.pdfIn PDF document text
    • http://rilta.net/userfiles/files/71143689376.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/furuxifenux.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/fudiwex.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614239d664579---97189602084.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/1104894135.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_off0000d42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 17716 bytes
SHA-256: 64b6af10f6c5a073c7665f6803cc689afc4aa8f83d3d2bd90bf9ff6b82c4632c
font_02_sfnt_off00011a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 10112 bytes
SHA-256: ee6f774a66b8838dec463f31a1855442f2df85f9b40ea81ff893dbdba47c42dd

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