Malicious PDF — malware analysis report

Static analysis result for SHA-256 7089be0946284e9e…

MALICIOUS

PDF

72.6 KB Created: 2021-09-30 14:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c8deff28311b72894140ca2825913177 SHA-1: 86bebebef6e26ef94472a57a5401c169822147c3 SHA-256: 7089be0946284e9ec090325f8d95479e1046441623a727a96f283f3f4c3181b7
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous external links, many pointing to potentially compromised or disposable hosting. The embedded URLs suggest an attempt to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://legouic-peinture.fr/userfiles/file/52849265263.pdf In PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/8127726918.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/finobawarorojaboxomopax.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/41148744349.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/fusaladafuvoduxovu.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/pudopadasap.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/29747888708.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/risakiriduwuvagawivu.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210920012710.pdfIn PDF document text
    • https://tele-video.ru/upload/files/nunegoza.pdfIn PDF document text
    • https://nocrime.cntwn.org/ckfinder/userfiles/files/98256228436.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/36885131087.pdfIn PDF document text
    • https://proia.bg/userfiles/file/56406663048.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/gelajuzevusokunijimiluka.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/70328676156.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/95cc12b67836bf463c27db51b827fb95/58185823262.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161474ae4d69af---dinufawasuze.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/janulaxolosozizide.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/63143246737.pdfIn PDF document text
    • https://yifff.se/userfiles/file/44725535824.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/8p9a64io0lais0l2niqmbhum9o/verikizasuxo.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/nopaxodetoxa.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/94375854979.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/ratobuvukapema.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/6280060622.pdfIn PDF document text
    • http://4rrecycle.com/files/file/49433719894.pdfIn PDF document text
    • http://njxinbell.com/upload/files/19614968402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=friv+2017+free+gamesPDF 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_off0000b8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EF 17000 bytes
SHA-256: dcca162b48351de341b2c197c567d6fa4e5322a3a5e0e8945a4809b3d47865e4
font_01_sfnt_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 10576 bytes
SHA-256: 0a00e6aafbe052dbe8a58e813a59167dfbd76704b5a2fdb197dbf2ca70bb095a
font_02_sfnt_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1