Malicious PDF — malware analysis report

Static analysis result for SHA-256 f143dda3e00963a5…

MALICIOUS

PDF

56.3 KB Created: 2021-09-28 14:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3d4d0612a4b1f7e662d4e1da86ff51e2 SHA-1: 3ae9a3f560f3f708d9ef5975c5b257679bd68b5b SHA-256: f143dda3e00963a52ff3d707daa81681347033e933f600069ff09691de13583d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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
  • 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
  • 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=mp3jam+for+pc PDF link annotation
    • http://nontaromclinic.com/ckfinder/userfiles/files/41962747770.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/betuxudavis.pdfIn PDF document text
    • http://reopen911.info/media/file/gokewawoxakugakixifoluv.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/dolusatafezisosoz.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/48281626021.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/96463808552.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210906025112.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/28105012604.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210914152138.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/pesituwavija.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/73100873129.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/89801030124.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/muvuzir.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/pidenilugokanudixodozidu.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/29121498777.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/tiremoditidemewa.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/nipadukamu.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/31376900366.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/jakixurinenakonakunepoxek.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7724cef9811ca6411a0ad1e96ae12ddc/80238983296.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/386dbf112c52fe0a28d8c14a289accf1/zufinalikozisovasim.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c8f4fab7bc2ff352844236eafe13489/felosa.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/vadawejepaji.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD50 14904 bytes
SHA-256: e01e3adc91db605268f87b8ea1291964a8ed0e06694539dc5b9c4549cc91407e

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