Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceee500d4b764d07…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 07:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 295dea6b307cae4ff91b9626c155dfdf SHA-1: 93ba391b33441fb512840f69292e292c88ab0c3c SHA-256: ceee500d4b764d07ecd831587c2e0fa1bdc7e436b0b63378aa895b1168400cdc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristics indicate the PDF acts as a link farm, pointing to multiple external domains, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://abarappresentanze.it/userfiles/files/93677269206.pdf In PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/f387c27335c618660aca4bb3702fae73/mozuxewaxumuse.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/91686933931.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/9578237766.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/bdf5a06a4e396bd0282659c0e617f72b/99412454388.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/2816147531.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/lerujawusemivo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/53242ba8cc72e67a0d86054d36db6058/gupawur.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/16269115358.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/0kubsv44cl1t2r7ujecf1nl6ta/53887299916.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/49974655435.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/zejetugagerumimod.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/cd1ceb9b7800ba39b92e1945b82ad69c/8209868221.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/dowinogufusu.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/wofilugisasanemipetamotun.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e3e02e3cdbcb7f9eb98482c1e69363af/bibavepetifumowas.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/nisale.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746d2acadff---fibepojazumuwejadamobivo.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/36692389436.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffb4c7b902c0e996e36a9a54e6a20383/16596372316.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/xesalowisugobepa.pdfIn PDF document text
    • https://kham.vn/userfiles/file/42408492839.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8aea747968---mezowur.pdfIn PDF document text
    • http://abnicum.com/files/file/95688093082.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210717064254262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=hatch+baby+rest+sound+machine+manualPDF 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_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 10980 bytes
SHA-256: c392084e0594056ce3e9a6c20f5521f837671c36a869b6fb22103274e70f89e3
font_01_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 18696 bytes
SHA-256: 6d0a300b7307496cdbefb62493e8b1de274f55466ed60e480c35e780013bc192
font_02_sfnt_off000132b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1