Malicious PDF — malware analysis report

Static analysis result for SHA-256 565def8bc4d8e183…

MALICIOUS

PDF

84.6 KB Created: 2021-09-10 03:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff03f2f5671498448232dbefbec4a29b SHA-1: 7cb57e095b9a88d4439c0d3ff33f0ce082276726 SHA-256: 565def8bc4d8e18367d4b6edae865c4a200e60b6d2406100ce71da8fc4a22a11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

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://speedwayinfo.hu/uploads/file/99888367573.pdf In PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/fuxirawi.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/dezituwodezilidunilokusi.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/52516999484.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/kagimum.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/81663186001.pdfIn PDF document text
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/vanegodomonorijigimiwod.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/fazezubesezabu.pdfIn PDF document text
    • http://foxadv.net/file/tikadafonema.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/2815871795.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/pivawixevupurezulakikiver.pdfIn PDF document text
    • http://e-sheremet.com/img/firafinoxipaxe.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210903130110.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0364c2cb4---sufevit.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/61063077640.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/40217633829.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/zidudasopojukofakefo.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/dc9a1190c532ec00efcefe53bbb80f8e/sutomojibuvebugup.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/kuliju.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/66414269188.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/40699363302.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/modapufejizabup.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/31268873464.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/sagebenipewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=kizi+games+100PDF link annotation
    • 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_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 10208 bytes
SHA-256: 43feaa163940a5dce87140435c9723cb6b2b67937f6c9d966176d303d827f110
font_01_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 18008 bytes
SHA-256: 9620a4b86d621f4e63bb012edea901c172f2a3a4237c69c4e6cbb31db458bfc2
font_02_sfnt_off00012d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1