Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e32a7e9823b5d09…

MALICIOUS

PDF

85.9 KB Created: 2021-09-20 20:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4a26760595c8149553f463cece1d1b44 SHA-1: dceb690a1b825a2f9d7aadce8b5659c5acce8a65 SHA-256: 3e32a7e9823b5d09447fbf2f65ae09ed4adab4e6454f777f7a8ce6c5009b27dd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external URIs and is described as a link farm on disposable hosting, indicating a phishing or redirection attempt. The PDF structure and embedded URLs suggest it is used as a lure to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://archism.ru/uplcv?utm_term=android+app+search+bar PDF link annotation
    • http://vyveva.eu/UserFiles/File/repiluxonifurab.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/satenojuxidenepetupiguve.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/dokafadaforozediduge.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/73122739765.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/41176530298.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/tigonepagow.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/tadedopazomibujit.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/jalozinopitevakafetuwovu.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/fepowizobafaw.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/91673960350.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/87274582421.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/11770561208.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/81196633714.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/66762588762.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/salikaxowigagesomemowu.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/gemizatewafaroxupajomima.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/50660965661.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/nibezagapazotidunamodizo.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/62680096632.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/rozumuvipapuvop.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/69989206167.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/gigudoxamufebazebe.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/nopagepo.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/dopodamam.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/92457322343.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_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 17236 bytes
SHA-256: 3d8ce11bd2ac2cded18042200d1ff48fb0217bb2910744fa0c5976f1eb8e713e
font_01_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 10588 bytes
SHA-256: 44e6f257ab90294deea449683f8b0c372872bc405350ed478013e5d77ea79b49
font_02_sfnt_off000131d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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