Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5e8f0b17e1c886…

MALICIOUS

PDF

68.3 KB Created: 2021-10-03 01:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9482bd876ab8169e20867b4cb1f566d7 SHA-1: fd3765a910a9c606b9737269dfda344f749bebe6 SHA-256: fe5e8f0b17e1c886d2db06c26f6d6c868666db14a4f8e3efc27045175e6f58e0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=income+tax+projection+2020 PDF link annotation
    • http://3mfa.com/images/editor/files/nuwireluzepumo.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/17170108481.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/gasidetorotojixofu.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/27887273627.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/sugizapib.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/gefejamuxo.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210929103131.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a4e60b904c42a86bd9cbbb137202fed5/fibotigonevixufasozoripe.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210925113516.pdfIn PDF document text
    • http://geotersrl.it/file/zonijuluwoliramo.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/mojirabex.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/segob.pdfIn PDF document text
    • http://www.heksan.com.pl/file/24689392896.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/91415511106.pdfIn PDF document text
    • http://creationart.hu/files/file/14990788556.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/burazujexixu.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/jegupavixibamasomofu.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/3839625573.pdfIn PDF document text
    • http://khocabien.com/uploads/files/kafarulanazuwubuxefufofi.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/nusopemedudigijolusu.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/43347262408.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/tokususizirubeg.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/24851880421.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_off0000b0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 13780 bytes
SHA-256: 50e5526b6cad68f233713b55505509c63854d05dd009d07d8b13e5aded111cde
font_01_sfnt_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 10744 bytes
SHA-256: e8f3e4d91021e576bae60d777af0e33110d7eea7bd42256996b43c27c26c0c73