Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25aee7b77fefd8c…

MALICIOUS

PDF

106.6 KB Created: 2021-09-19 02:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 331c4340ce14a7b757f3fdab83055001 SHA-1: 05121c8bcfebf77b5317e2507e814370a506d5db SHA-256: e25aee7b77fefd8c140fc02a75347e6dae06d49af985bcd792cb4fa1cae759e4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of link farms hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is a common method for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=space+marine+codex+9th+edition+pdf+free PDF link annotation
    • https://tsolisp.com/files/file/vogowotenidu.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/miwusapat.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614468c224c80---93220794862.pdfIn PDF document text
    • http://specialcats.nl/media/files/34134209469.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/feratexosefuredivuxum.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/xufiwon.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/biras.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161354f0449b7c---rerope.pdfIn PDF document text
    • http://evola.it/userfiles/files/5145414094.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/surotagaropixu.pdfIn PDF document text
    • https://fishuntpesca.it/file/gamizoberuronute.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/76118057262.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/79206930105.pdfIn PDF document text
    • http://shamayachts.com/upload/file/vaxefidesanobu.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/74397377465.pdfIn PDF document text
    • http://sro52.ru/uploads/files/61145202478.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/1804962121.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/45656402576.pdfIn PDF document text
    • https://chp-travel.ir/data/file/71455463029.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465e12dd0d4---pebibeteze.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/belilamamizafinakisekis.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/nisesesaxopanutaluvolegub.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_off000138a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000150bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BB 11016 bytes
SHA-256: 212360984c0923f9be3ad5f7e7cd4ab67b2ac7a0b44fba2cee31b181226ea524
font_02_sfnt_off00016a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A26 19444 bytes
SHA-256: 64ce6754884c8160a95c53d6f759b576df64e68d0d407f57ef6f748de4e5e6f2

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