Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0f8aac5ca33cc2…

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 14:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 85ccab3ae58313b69224e64f79bdbf02 SHA-1: 8ab0016a36eff44a078efe485528549b066163c6 SHA-256: 8e0f8aac5ca33cc241571a652851ad7b72f4cf6b0bc8679b2f8fe86522e7bd5a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and links to algorithmically generated URLs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm designed to host malicious files. The embedded JavaScript likely facilitates the redirection or execution of further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://buydecor.ru/uploads/files/78475285708.pdf In PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/46929454517.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/vakakugofalikuxizuriw.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/9008005249.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/lrq177t281e4hh0lmopouo8ic4/sizuwubip.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/navibaropibami.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/84115784377.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e665eaceec---81493654477.pdfIn PDF document text
    • http://usateatop.com/_upload/files/78705657896.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/25265910043.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/45360174299.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/32565433478.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/24189190934.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/vufiwigiwigewe.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/2749071676.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/sazexegoxasaminumixumu.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/wolimujuwimogad.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/80937881920.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/seperanaf.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/69516198265.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/podakepifumovofilenapuzu.pdfIn PDF document text
    • https://redac.ch/upload/11530055670.pdfIn PDF document text
    • http://eventechsite.com/files/files/76342447468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=my+phone+storage+is+full+what+do+i+doPDF 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_off0000d39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 11072 bytes
SHA-256: be625718801c06a3d9aaa5b1ea02c04edf787a2fd8a9a57a38c2954ce428725a
font_02_sfnt_off00010551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 17272 bytes
SHA-256: bd837b145afe072f8c94e5b392f4c9f2fc27fdf787869f527a9ce8c5b9254079