Malicious PDF — malware analysis report

Static analysis result for SHA-256 046b16c9c3755703…

MALICIOUS

PDF

80.3 KB Created: 2021-09-13 06:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f3da951d4b94a718eb5b0ae8651d4dcf SHA-1: 329e3a280468f270cd60d77953edd7816645437b SHA-256: 046b16c9c3755703e7af3c9e6f609cc4c747b4f3c61eb17c49c9a8c462594e0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612faa7084bcd---83051439843.pdf In PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/ponapupagaluneferigefela.pdfIn PDF document text
    • https://synersys.fr/contenu/file/48809266776.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/3470263754.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/xubakigusiwesu.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/17395648427.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/70173301944.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/57299474293.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/36397369192.pdfIn PDF document text
    • http://bdnchem.com/upload/files/xesojoliruteref.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/28134220145.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/57743499850.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/sosedaxi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161379df052636---dufaxumanusixigup.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210905123610.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021911171235402.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/28662998645.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/resazadiwe.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613df44f971cf---27668886155.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/87337747858.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/59813163530.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/nesoxidap.pdfIn PDF document text
    • http://camonetinternational.com/files/file/23593136321.pdfIn PDF document text
    • http://domplus.su/userfiles/files/79613266418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=do+androids+support+flashPDF 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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 17224 bytes
SHA-256: 818a64f84d0e72749a6a3f59aa64c13bf4e1dd04574bbfdebce2010edf1d1180
font_01_sfnt_off000103b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 10564 bytes
SHA-256: f6d0386106aca10b944dec6e693cee7cf98a638c3381957402231f52fdcd6c3e

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