Malicious PDF — malware analysis report

Static analysis result for SHA-256 0894d16faef264ae…

MALICIOUS

PDF

102.0 KB Created: 2021-09-18 03:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8a2866bd12c5c78fd34aaa173b5d76c6 SHA-1: b48e359c7d28e1304b21d07aa7edf105eed3e140 SHA-256: 0894d16faef264aef3f40f79d241dc30d9f0d86e6a625aaca2038b280e90e22e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations. The presence of multiple external URIs and link farm heuristics suggests the primary goal is to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://irlanc.ru/uplcv?utm_term=convert+angular+to+android+app PDF link annotation
    • http://studiozammuner.eu/userfiles/files/83540510121.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f41c040b92---wulezofixoxuzifo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d180185f0a---wadudakomuwigowuzogux.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20210907_10_14_22.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/202194946438637.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/10407352294.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/60493494970.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/kidiromoduxodamivijo.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/wejofiboxanijova.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614161bcee3a9---95124534748.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/finig.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/zumipex.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/duzasiruwalugabe.pdfIn PDF document text
    • http://usmleworkout.com/files/file/31895752551.pdfIn PDF document text
    • http://redactron.com/userfiles/file/wiwof.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c809cc859---wujojezazafekeximomi.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/24723964013.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/vuwoguxavepuwovegipi.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9dd98e2bad28769a2f7b7a51e1a90490/lamaviluvidawoka.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/60308435982.pdfIn PDF document text
    • https://ibextrail.com/editor-images/69070599037.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/pidumufo.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210911063826.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/vidukesukodisunop.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/pemiravo.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_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 22068 bytes
SHA-256: d057230e301022a2f4d2c3ea7c925d3f56717a7411a4617c86b5bb321cbaf708
font_01_sfnt_off00015a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A41 10596 bytes
SHA-256: 6cc4c278818481c7afb359ccfe736ba907d5a29e1ec059e09fb343383441ecd7
font_02_sfnt_off00017261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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