Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0d70dbb813a83a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-13 15:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ab15c5818aa8d9d55806d1d613db05c8 SHA-1: 56e1873756f7d7c8184afcc0dd148db4316120a3 SHA-256: 2e0d70dbb813a83a4743881394d887970055c4093d6bbd87209e8366a78686ef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to potentially disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.
  • 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://sowlindia.com/userfiles/file/29524482206.pdf In PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/8075977877.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/61269451578.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/xuxubogunarodevani.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613772b4be43b---23635132910.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/sisumeduborekolawirut.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/pelilesedijefagi.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/gelesofidekuga.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/riwuzi.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613012d18670e---fefeg.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/pogozeliluvesu.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/tapavixurawu.pdfIn PDF document text
    • http://mobil-tech.com/files/baxuxozab.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/dabun.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/57089587652.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/susudonogodanaloko.pdfIn PDF document text
    • http://crm333.com/documentos/file/75466677865.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/wobopawosediwatubolupir.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/xenunesotunevetozejake.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/45004780754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=discrete+mathematics+schaum+series+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/25297199295.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_off0000d583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD583 10716 bytes
SHA-256: ef522c26dc53ed406480fd11c3f5fbacd1a23864dd48fe8a78f7daf523cd677c
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 21428 bytes
SHA-256: 7660be65ae4f6487a81613727895f873192cc10edace46837b079ff55adb52a4
font_02_sfnt_off00012636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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