Malicious PDF — malware analysis report

Static analysis result for SHA-256 1398e708d289b1de…

MALICIOUS

PDF

85.7 KB Created: 2021-09-14 12:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6fad4d9ccb02068ed5d758a69de07d9c SHA-1: a1949224afb51b12affb93a7b11e314c73ebeec1 SHA-256: 1398e708d289b1de43e3adcd2b06494218c2c50c631757dcb941421b0ccecb5e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the conclusion that this PDF is part of a malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://satesayap.com/contents/files/pofixomazojinixaboj.pdf In PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/1182443241.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/22378309455.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/kalixije.pdfIn PDF document text
    • http://acelybio.com/upload/files/85605819903.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/nogomakukukeli.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/zomaretesisibuwevubow.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/58222159885.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/18118465374.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/xosimelef.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/tuwamanozufagavojatun.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/70108362312.pdfIn PDF document text
    • https://tmtteks.com/files/24174990288.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/21503927644.pdfIn PDF document text
    • https://msiutilities.net/documents/27824896023.pdfIn PDF document text
    • http://tiquital.com/documentos/file/2706780179.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/19835539754.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/lalegedijozipezobenakigi.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/valevudutuxiku.pdfIn PDF document text
    • http://tradotel-riviera.com/file/80429986330.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137ec37586b7---43668366626.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/wiwuwafomoku.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161363138d1de5---gerefife.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=john+finnemore+souvenir+programmePDF 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_off0000e9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 18032 bytes
SHA-256: 4829c24a9438d93043125feb537931551a057541d4261428b60ad72e66ce135b
font_01_sfnt_off00011865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307C 10816 bytes
SHA-256: ad713589fda9ada068c175f24a95e96c1d9267153ac5554801802997398e6475

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