Malicious PDF — malware analysis report

Static analysis result for SHA-256 378142427ee07600…

MALICIOUS

PDF

81.3 KB Created: 2021-09-14 02:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e165774523066a9a60e295e6fd1ed352 SHA-1: 91066e3e627cc84be7579f0aae5f28d081e0eaa8 SHA-256: 378142427ee076000d366f4a6e5291a4059dab3a7f88b82bfb93c280a8aa7aed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically identified it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of multiple external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ph-easycome.com/userfiles/file/44805092064.pdf In PDF document text
    • https://bazk.info/public_htmluploads/file/ketujudirofoxis.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/67980566492.pdfIn PDF document text
    • https://12shio3.com/contents/files/rozabejuzano.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sesezimurosumetefipupasij.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/gavukudo.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/motawovejasapodomuso.pdfIn PDF document text
    • http://mcutech.net/files/79064616375.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/kosoxani.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/25874391138.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3l8ktlitc5rnr8eptltpkadg14/kilupokabidiro.pdfIn PDF document text
    • https://norservis.com/files/files/fekegi.pdfIn PDF document text
    • http://acunambalaj.com/adenoto/upload/files/rutepovez.pdfIn PDF document text
    • https://0900107678.com/upload/file/dopafoxe.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/22011120868.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/xudixuluwixesilumefuwit.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/95448731834.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/wipopabunanoleti.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/37688954165.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/61728939066.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/41894023221.pdfIn PDF document text
    • https://panoramabyty.cz/content/86034483926.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/52810182045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=clash+royale+free+gems+no+verificationPDF 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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 10992 bytes
SHA-256: 349203d603e9fc560c42ec963b90d7dae42f6ad1dac86faf5b7e121c358d8476
font_02_sfnt_off0001080b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080B 18072 bytes
SHA-256: bf13c89a6983fa74937df1af8d89f251c37de65cb1e12b984fb9bf709e9cd0d1

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