Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c048239807ffc92…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 02:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a50a8ce23d0035f7887b740e937cd5a SHA-1: 09589c4a9f9f0fbdcd1292a63bf0706df33028e9 SHA-256: 6c048239807ffc9296f89323627839f5a5f6947b14a25c85e49565d45baed6a2
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains multiple external URIs and embedded links, many of which point to potentially compromised websites or disposable hosting. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing browser-related software, a common tactic for credential harvesting or malware delivery. No scripts were extracted, but the overall structure and heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nomylo.ru/uplcv?utm_term=chrome+86+android PDF link annotation
    • https://sharjahcements.com/images/bulk_images/files/lazewas.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/79409830776.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614241e97f1cb---32309316450.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132c47bad330---31787888404.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/47624493855.pdfIn PDF document text
    • http://abwrva.com/uploads/files/gavivonivadukubuguzorug.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/gaxex.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/15802217201.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/vabubifomonebutemobasizat.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/7309803358.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/rarupirorafo.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e126942c079d8914a8d572839b4f93ea/milupu.pdfIn PDF document text
    • http://gensugroup.com/upload/files/zefaka.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/mofododixogijotimekora.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16138fb6b819c9---99789172381.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/57563671146.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/489168089.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/68096073762.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/dupabimebavowa.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/gazidopigopa.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/goxirogidarax.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/migijirokubixemoru.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/zolemijefutir.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090513442873499.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/zusigoxupejoze.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_off0000d361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD361 10608 bytes
SHA-256: f8dd8e0c1ae8260e1c4ad991417d06d446e33e6b243bd27695ef5b02697e7c96
font_01_sfnt_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 18076 bytes
SHA-256: 06fea8c07b08484dbda377bfe36d2055c3ed9c589c47243e8b779bf2e46e5e4e

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