Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca78ea7d77d2160…

MALICIOUS

PDF

100.5 KB Created: 2021-08-19 04:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a8336d6125c323bda576ef2a2ec0c31c SHA-1: 3270ef0f3026459c1c793fbc820aaa4ef6e91e48 SHA-256: 1ca78ea7d77d21604fc26a0c73a55966d2cbeb292f77358556326c76fb9ea933
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which appear to be part of a link farm on disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/uplcv?utm_term=como+buscar+un+telefono+por+gps+samsung PDF link annotation
    • https://promise-land.com/upload/file/tovipipupeza.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2ec54100d043df68f3ba831323cb93f0/49069856884.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/21434930190.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb550889d7---favewediwo.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/6a118d43610cd03673d635f0ff12bef9/53491116796.pdfIn PDF document text
    • https://bnovum.hu/downloads/gunad.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094deaaf1738---jibetizowufosek.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/kaxejabe.pdfIn PDF document text
    • https://digireg.org/upload/62152323256.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/79261983338.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/b971ba2ff9ab67d133704e003f668f54/98009052741.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/acc5f057304bc20cf648c3080b3b3382/56976221037.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/gukumibetufe.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/87607571358.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a472604b---tudisozubuzupuxapemu.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f7e250c20---84705797200.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611320fb46828---34906909052.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/96589925559.pdfIn PDF document text
    • https://vestol.bg/files/file/66602323141.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/c5b1e4833d0a69f531293fd4c74bc53c/tutorijudoj.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/mudapeminunegevef.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc9165cc59---60334754758.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b00621dcf58957ac2496aa1cf87aa9ea/vilamoxe.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4fda5c106---44924726382.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_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000139e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E5 19188 bytes
SHA-256: ca3fd700356895211fb205dfa5706cf0c0327809ac15d5888579bf5a3ac16744
font_02_sfnt_off00016a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A9C 11004 bytes
SHA-256: 045c1f9b339b9d5b64bddd73db2938a0aa3574859d81fea5c8d0dc635fbec091

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