Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca0060d504a4929…

MALICIOUS

PDF

88.4 KB Created: 2021-10-31 23:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a251c913edd426c36c9f82d2bfedf9e8 SHA-1: 5a56d7344404718fc8f736a69492033bc9d13336 SHA-256: fca0060d504a492935c5d32cde38d3cc12e4cbbf72042fad84f4d4c4b88f90ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is intended to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ms01bet.net/contents/files/fuzemujufoxubatosave.pdf In PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/miwax.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/puwilanotofofa.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/55508833850.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/lobepogoxof.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/43085223107.pdfIn PDF document text
    • http://rs-entp.com/upload/file/javunivewododivabijira.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/46449937626.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/dexumap.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/kedawudekebuz.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/jepuv.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/4046c00251fad47385a56f10c596a7b9/94275726695.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/19876700175.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/zivonod.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/25992013850.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/18804922109.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16164e259cce6a---siwosek.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/50495696550.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/govewafurit.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/48529877307.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/54474792504.pdfIn PDF document text
    • http://www.siposferenc.hu/html/femavokumez.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/40500685105.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/zamunexunusipikuw.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=what+does+catching+a+yawn+meanPDF 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_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 19288 bytes
SHA-256: 4a03ec13bb9c14e455639669518fd94d952aea15c442c7f461f2fc09213aa4b7
font_02_sfnt_off00013b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B15 10864 bytes
SHA-256: 87fc6cb6267c7b62ca798c79d14f4f550898876d91f80edacf34bcdd7c88c101

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