Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0402daa3c271b6…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 06:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 533a76adbf57d1f76f0fcefff53fa333 SHA-1: 60faee7e1ad0f31a4147a88a2262028b01ba615e SHA-256: 4f0402daa3c271b68ad4bb5023726fd6a2a4f79a0d92e213e14d8703ea8f30a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'convert pdf to excel file online' lure in one of the URLs further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://speckletrack.com/update/editor/file/99696853334.pdf In PDF document text
    • http://khonggianxua.samdigroup.vn/app/webroot/upload/files/87822635366.pdfIn PDF document text
    • https://12shio4.com/contents/files/36109830334.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210905_062819.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/2fr137hepks19ljoplgtk111vi/89967362973.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/22719885683.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/36510154823.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/13439387343.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/xivabineguvimume.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/tonixejugan.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/kibotadojelef.pdfIn PDF document text
    • https://eguiders.com/uploads/71923576666.pdfIn PDF document text
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/vulebefapasedufositadatos.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323af33416f---feponetoxetewisopuwebap.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/13509729105.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/82443675218.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/383109760.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/pusejaxalezefulum.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/8114036442.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/fanidotowodosipevoduk.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210914_79D7DB4E174C8580.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/polukefajob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=convert+pdf+to+excel+file+onlinePDF 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_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 17088 bytes
SHA-256: 2849f78f03ded7d2ebb5f255468e56ee69c842fb0cb2f376e743b7735dab10af
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DE 10484 bytes
SHA-256: 13ee74b291af1f7df1b9f061efa5a9d393086c7f3abb3af07088f1b399f22cd6

Open this report in the interactive analyzer, or submit your own file for analysis.