Malicious PDF — malware analysis report

Static analysis result for SHA-256 18acce7fad2a5ecf…

MALICIOUS

PDF

85.1 KB Created: 2021-08-12 20:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bbc19f87ec71f2687ac03df6382956ec SHA-1: 50cb18c7e0030306397dc7f361465b08604f783c SHA-256: 18acce7fad2a5ecff54adae20c80f4578b390884598a75030303d3231ae66f01
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of 'utm_term' parameters suggests an attempt to track user engagement with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://pixomot.ru/uplcv?utm_term=feelings+and+emotions+list+pdf PDF link annotation
    • https://ajwatravel.com/wheelmarine/userfiles/file/91166729969.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/44322406800.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/53735590314.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/79263956648.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/20615820333.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cttev3qets86asiiccmv1s7lkg/zogudelagopotenoz.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cb93202d---18234559773.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/98590616212.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/52992449146.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c851ace9c---jakax.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/fusasigixi.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a665e67db---22084430682.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/kozivamego.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089798a25e1d---latunabunelibi.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/kaxebazezadazop.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4f9605f9ca30d74ab8b0795ab2e90cba/77314034810.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/mipinewezarixetinas.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3149719a4---74185831623.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/34018f540006505f6a9e95685fab455e/10641165200.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/wugedosazojedi.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6c2fe3d30---masaxezikobekugajofoso.pdfIn PDF document text
    • 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_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 10720 bytes
SHA-256: 254893cad8882a8375ed3a979b213bb064661ede6c9b13b115ed953c17ee5409
font_01_sfnt_off000103a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A0 16892 bytes
SHA-256: acbabd61981e63e6407d219033c769d731214a13d7cbdfd753df1bdb1aa2146a
font_02_sfnt_off00012f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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