Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a2c00ac43d382c…

MALICIOUS

PDF

70.6 KB Created: 2021-10-01 09:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 667817392d52c71f0ef973d66bbc1876 SHA-1: 5f83d7ade4c558a721d42b0290eeba9cd2a8139e SHA-256: 00a2c00ac43d382cac0201f3cb1f18d305437924f1948659750fe1af47390aee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=best+android+interval+timer PDF link annotation
    • https://samsungklima.net/upload/ckfinder/files/58430725739.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/25696851138.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/xixikufexi.pdfIn PDF document text
    • http://strandedtattoo.com/file/xesolakefimefonod.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/26422412787.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/80102318634.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/radimi.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/zaxegow.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/24648044613.pdfIn PDF document text
    • https://airxps.com/userfiles/files/47363414282.pdfIn PDF document text
    • https://projetovm.com/uploads/files/93083221365.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/73275429349.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/wikuzozuvolubifumumaxe.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/zepixupoxidek.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/11859011335.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/zedibepirekidibugofipit.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/78971887732.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/dabijolutibabageki.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/zonodikajusalegawul.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/81ed1904a98615b24334b9cac771a91d/94366830185.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/kewewazum.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/kafudomarurulolaw.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/xezorugepatefa.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/gasawowez.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/ledapefemet.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_off0000b336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB336 10528 bytes
SHA-256: 9fec39f7e71e822860f1b5293fe0c503b98843d34f902c1ab28120eb15819209
font_01_sfnt_off0000cb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB34 16232 bytes
SHA-256: 188a7f89483bfbee952f5a0d6d242c5421635854bc40e3bd4a74991759a64162
font_02_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1