Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed87068059b4e9a…

MALICIOUS

PDF

85.9 KB Created: 2021-09-14 05:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90c46d12d0cc4cf4cde8c1ed978dcee7 SHA-1: cfb069fb25ae2297511d6205c5969a99dac77b7f SHA-256: eed87068059b4e9a1fc052f3eccd0bf146407c4f6704ed1062f7e01f232cccd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://allier.proximeo.com/ckfinder/userfiles/files/zimenixez.pdf In PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/84179530225.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/repobejuzoxuxisijetuwe.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/41898554630.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/famagi.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/58707444317.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/pilufofixowisiza.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e81d6263693a415fada996b4dd08d35b/gejemoxututumanilarejive.pdfIn PDF document text
    • https://campermagazine.tv/public/file/bapoja.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/36814788843.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/kaxel.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138721fd6c24---89649702143.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-4/20210904142739782264.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109061507508023.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210904061218300686iw8dj.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/duwom.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/16921876556.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/91719616848.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109022243003107.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/52582645032.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/96950625709.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/xopesag.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/rijozekige.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/javunikukibilejasewefere.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/dewelifisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=f+and+q+wordsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5A 10080 bytes
SHA-256: c7f27e19c2e01e5e67dbd631fe78861af63e80c352e488ad8236675645c7b614
font_01_sfnt_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 16208 bytes
SHA-256: a2adb8fc625b89fa481b9525f46cf152abe44477af6463e7d09af87e82f79716
font_02_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 22648 bytes
SHA-256: 87a169d81e6d850df1609f41d003d18294774215fc1ce726bd73e19809752d6e
font_03_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1