Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9062c8483412549…

MALICIOUS

PDF

76.1 KB Created: 2021-09-01 13:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8b7df5dc5e1d601dc6411044873498cf SHA-1: ecdeec963a08232b1051c3d07e923d3f5afb80c7 SHA-256: f9062c848341254975a0dd27cf9ff10e0c6b7b8f881990ea3fbf50aedbc25515
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=deceive+meaning+in+tamil PDF link annotation
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fba4b936c93f51289b33a8cbda29bfdc/26157675231.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160977a0c71fab---68641821257.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/acrsqgjbmjtdoap6o9i8lcb3d0/mokotufavobiwezagalap.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/woresiletojalazenepula.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/digejiselifibepugofojojo.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c0a4e168---sijitenipuziv.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/vireduxojajate.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607132bcc5ad8---gejawowidofowotaro.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0de7d42e3d1e572c9d453644d49c31c6/22753949215.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/53724497268.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/zurijaworonopiba.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161121466879fa---46718573409.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3918e40fd8---zuruzizabekuzur.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/dasojofozokabifanexexisa.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/nesalazijigizabodurimol.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086828071cf7---newozitujakade.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/60401794221.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/gefaxezevelo.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/jusezepokinikegetetavoka.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/mutitaxepexilim.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c79ad27684c---33466084988.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_off0000be73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE73 19824 bytes
SHA-256: 64c611fe2cf13bde7d057b913bd12b30ece368ac971518359bae7f370bd11311
font_01_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10252 bytes
SHA-256: 9d30f536b37785f1a20e53bdd76cd8264c8c1398576eeabc80794ec0ae6ef4e3
font_02_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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