Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d0458732a13261…

MALICIOUS

PDF

67.4 KB Created: 2021-10-01 05:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 11d6728599fc2e4557faf9a450dd33f3 SHA-1: 7f443855bcb85fa0189419a9409aeb9f34e63080 SHA-256: e9d0458732a13261331d59648a08f5be719f274594be2e4e7f1ecc735dcd9ff8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm with 30 external links pointing to various domains, many of which are likely disposable, indicating a probable phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=streaming+film+9+songs PDF link annotation
    • http://drivingschool-brno.eu/files/98273998343.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/nidexipibi.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/dolotefobafudoti.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/lowuri.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/zufusisusorusalefikafezam.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/95117050806.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/90615917064.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/79348451969.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/78019107082.pdfIn PDF document text
    • http://sadrokartonyhk.cz/images/fckfiles/file/bemax.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/gexirezumepovinipi.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/fikumunukizapejozele.pdfIn PDF document text
    • https://redac.ch/upload/37997882159.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210909_2D3F3DB9ADBC038E.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/megirojipoxozinijene.pdfIn PDF document text
    • http://mfcpavpos.ru/file/fozowizoragulerimimenike.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614f84b173f1d---57513240258.pdfIn PDF document text
    • http://hocomesun.com/upload/fuwagebofisowafo.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/nojebolinuburapi.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/8578072834.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614887a7d8c39---safabegesuradefudeto.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/94968915427.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_off0000ac3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3C 14368 bytes
SHA-256: 733a55163c8d823cfb40cc5d07cd3e84d7240468784de80da83e09226b61ddba
font_01_sfnt_off0000d04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 10800 bytes
SHA-256: 46767eb5edaafd7651b7d90dad86650903b95599a8c658a29732e3c9dedb1cca

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