Malicious PDF — malware analysis report

Static analysis result for SHA-256 150e9b5e8c7c5d31…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 04:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cbc991512794c8b57532706e5456e0d7 SHA-1: 97712b5a969f1bf851fd71cbe04c731a0f59429c SHA-256: 150e9b5e8c7c5d31ed3ff52789d3261c92b9105f88961d2edc566f595c9a20e6
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to potentially malicious domains, strongly suggests a phishing or malware distribution attempt. The 'SE_QR_LURE' heuristic indicates the document may instruct users to scan a QR code, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://giasudaihocsupham.com/Images_upload/files/paduxefemugejor.pdf In PDF document text
    • http://saraya-shop.ru/upload/files/75181138033.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/86741728488.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/44006034843.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/xusexowagowe.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/73845298383.pdfIn PDF document text
    • http://emeat.ru/var/files/ragal.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/48928662556.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/bemijokonuretulivame.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/jatesepusikot.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/q2tj6lqmg67291en85u4eojftb/siganunedetinidomivav.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/91534871482.pdfIn PDF document text
    • http://hoachattn.com/image/files/tebukolaratojewewunadodok.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/gomewodijotok.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/53471646012.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/39178859916.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/kaxitutexilukowekepoxiv.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/modod.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/reboresituzuwiridexofu.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/25094893024.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/71825390963.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/90941283024.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/61166159303.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/24338800559.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/50741812382.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/78679153303.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1b15865bb---wogoje.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/bajevifijogepijebipefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=demise+devolos+qr+codePDF 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_off0000dc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC28 10380 bytes
SHA-256: 0acfdb7dd3f7d8cce4ffd104677e18dc9f0acb360203485dde90d078d0030479
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 17652 bytes
SHA-256: 7ec99624cd051ab654abd244b154a5fba8e5a5a7ee773de0c02ba1840d0f033f