Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c39ffd219b597ac…

MALICIOUS

PDF

85.3 KB Created: 2021-09-11 03:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3834b063dfed6915fb7a7e797a84dd5 SHA-1: a25010187d96afd8e7bca8901599d3a69669e6fe SHA-256: 6c39ffd219b597acf90c606f09e1efda8cff721bf5cb905c5effc0f7f62331c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to numerous URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and compromised CMS upload links points to a tactic of leveraging potentially untrusted hosting for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://hopclickhospitality.com/scgtest/team-explore/uploads/files/32107124269.pdf In PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133fceda3cb3---17804510220.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/kifugi.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161385e3589766---86330100053.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/samiripatuxinixolopufego.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/tedizerakavokitovegevaji.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/17238375259.pdfIn PDF document text
    • http://cwesp.biz/upload/file/97169844184.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/babazetofovabukusolukowag.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/poruvadupi.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16305537966312.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613beecae7242---35614815551.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/fepogunew.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/647fcb6873560a9954a80105c06026e3/57428173813.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7f6f64433243ae9dfbfa584354b4c658/74936544560.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd062ca43f---ligajozifawe.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/47894089964.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/memaliriw.pdfIn PDF document text
    • https://campermagazine.tv/public/file/47627788197.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/vazaxin.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/zurejebudewigikex.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/54360378554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=nofap+app+androidPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/55304782121.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_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 18460 bytes
SHA-256: 9de790ba29cb754fb583063c1a08606a0da3751c220282958d7435153a097a84
font_01_sfnt_off00011995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AC 10024 bytes
SHA-256: 7dd8c85c1f223ae73f5ec0ca41b2f2bb9ab2a029f18c5f91f9d04a8115e285c2

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