Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aadf5aedcea8647…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 10:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 477656a2e2c49d4f65244a055b25b9a5 SHA-1: 37f9de3da231e760497a7cb909a810df785d277d SHA-256: 0aadf5aedcea8647e55550a0e9d6b79b7ad2c14f4bcd069f58ca89cda261abb4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with the ML_NYX_PDF_MALICIOUS and ClamAV detections, strongly indicates a phishing or malware distribution campaign. The embedded JavaScript stream (PDF_JS) likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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.
  • 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://cructi.ru/uplcv?utm_term=example+of+an+application+letter+pdf PDF link annotation
    • http://kqcme.yiaiwang.com.cn/upload/files/dujurapusurobifekokotet.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/43010792176.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202108302021312682.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/kebafumilimofuwujajevik.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/dadesiwuxumanirelewed.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/88645248173.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/fovilogevoziwusunefa.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/7aa3da0b8ac8a950f91abe9b14c55a9a/kawetudunuwunavimo.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/bubaw.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4269c8f037---jetojizetuvawekulu.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/30996833293.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/supifilipoto.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/34450093447.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b615f713f6---jabonafagolobigom.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/lusojeduludagenez.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5869a4eba---mefum.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/sisojipudobatasujudirejab.pdfIn PDF document text
    • https://mfdesign.hu/files/file/41493590460.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fd1732b5e---daxufurukur.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/0f9316ab97cc6cb041e5163bcd2a2698/fikiwawakozikiza.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96afc9321---konazofozevixebalor.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/rigimalajemifinetovudoti.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10696 bytes
SHA-256: fde60bea819cc7db46c29ddcd3d763cebd854335594c42ef87e0ea512f27984a
font_02_sfnt_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 18300 bytes
SHA-256: 17530835d27d1df7770a8016f405c730d9eb937b89c37d1bc7908a48819ab583

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