Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ae85ac34d51b4c…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 17:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c61a787dbbb798280b3df01e7b8fdd24 SHA-1: e7d4ca09857706bd1ed006c34ca38083a21a9e23 SHA-256: f1ae85ac34d51b4c921c4262af4eeb77b974f0d83dbcc7c80b5f5c2093c3e4ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The structure suggests it's designed to lure users into clicking through to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02b62591f6---galumadogasepevuloxedu.pdf In PDF document text
    • http://robwalker.net/fckupload/file/6859002290.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0afee6748---36456969853.pdfIn PDF document text
    • https://kar360.com/resimler/files/32184144814.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92787227200.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/39849925287.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/robapugonolo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2b5476dce---69302178899.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/vibunabizewesavapede.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/rivukumavulilepobedi.pdfIn PDF document text
    • http://surtek.biz/image/files/20150117_091105.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/eb4043364c14bca82c089b55d88c66ac/xotenumavaji.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b314c345e79---tiboxibekotidu.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/23c614027r9j43abmannhg6b93/86502858528.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/60443705812.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/u6uut63n4cb1b6n4t11b046861/9939762315.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/2af2119b8449c29c597fccecc57eb7d6/dimij.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/57819355608.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/bosobuzude.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789382e53e3---muzokebutofirenisipad.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cff1169281---tuleneperetuwoga.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/tajafakinovufifijijavu.pdfIn PDF document text
    • http://learningkey.org/userfiles/4729456031.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a32d5790992---21243516942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=agriculture+o+level+notes+pdfPDF 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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 10780 bytes
SHA-256: 7ece07b241395e1c3b865703fb72ade7ebd1ea6f152bec21ba241e5c384ebd6c
font_01_sfnt_off00010090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10090 17980 bytes
SHA-256: b83f3e8662ce8dc95897adc7dd0146cd71e37c7f5767b009e52d67a726bd641d
font_02_sfnt_off00013038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13038 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1