Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b819462f98730e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 09:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 230e731183d0a12ab3383a006f7c847f SHA-1: da60b8e21f1891275ee0db2f4ebc3a99f859412e SHA-256: b0b819462f98730e86cadbd97a7c90204a7d9c34c11a7ed96742f42f8033983f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pixomot.ru/uplcv?utm_term=research+design+in+qualitative+research+pdf PDF link annotation
    • http://pn-tech.net/userData/board/file/71659725112.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/2645735926137d50cdfcaf.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/fixagupexabuwomuximej.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210909_86E4765618EEC0B5.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/kijelakolopapurojuzipe.pdfIn PDF document text
    • http://szhlfz.net/upload/nubulefitiwiluzopevaref.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/43597646547.pdfIn PDF document text
    • http://e-district.org/userfiles/file/pukosejuxusewatewul.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/selazabedajagoxofinivu.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/7b596bb8591fb4a7c5e723157c9dbf6d/67774835350.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-03-11-28-34-12.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/wuleniberubanawakuturow.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/vofonuva.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/podiveninedejagaselog.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/budaf.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vgeka2813jh0cktier7dbt4gug/77418531226.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/luwozizasili.pdfIn PDF document text
    • https://websbag.com/uploads/files/24578658700.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/vopip.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/79419571288.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/rejojuge.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_off0000d275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD275 17996 bytes
SHA-256: 0bf8ed64424dd1db7a3e86a302103a3802e9fb51b773e91b5088e94a633af345
font_01_sfnt_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 11136 bytes
SHA-256: 1b4c17cabcc126e493df42e3b5216a9324ee17b9fdaf8bcff2fc6e5a45ccbffb
font_02_sfnt_off00011a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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