Malicious PDF — malware analysis report

Static analysis result for SHA-256 02481f10cd76f160…

MALICIOUS

PDF

83.2 KB Created: 2021-08-21 09:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2edcfdf1605db375df9d5d40122ee057 SHA-1: f5f1f2223c01451d1843ff3cc3b67a2e3076061e SHA-256: 02481f10cd76f1607acd602c994f00f293d17585c7870b35ede2e802a8a94166
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. This suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://digivideos.net/ckfinder/userfiles/files/fedunu.pdf In PDF document text
    • http://riccaassociati.eu/userfiles/files/23874815271.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988900a688e---59521520490.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/92779918267.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/13483b1d6e39637e789b8ef9aac0f9dc/rosemotabosuwetadovigo.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c641e09087b25e392ea4522b35e4473b/goronebesovefafeforute.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd49767a174---vigiwel.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfefa8ba372---83007575125.pdfIn PDF document text
    • http://cga82.com/admin/File/nusifoz.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608558fa255a3---xegopuzabisiguzovomuxapog.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4f18022446403c3fc267e830835aad1d/9187684503.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/11673491803.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/36413486072.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79e2761e4---45859529652.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/geloxodi.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a650cddd1c---56487714272.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/wunadoxobokas.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/25095397576.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed98db189f4---boveribetovatuxevepinad.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/67427136459.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/aa0549ff8108bc83befe5a9e67905a5b/vebusivopokomigufopukom.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/jopozugov.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/5d553a070b2e059138e44da1257b9e2e/zojoladixikegowipadazow.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021072614564173.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/14493857966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=beginner+piano+books+for+adults+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_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 11056 bytes
SHA-256: 1666282576a1834e679d9fc48c7755da7d83bfc5d2e19eb1f617e663fb725bd3
font_02_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 16996 bytes
SHA-256: 6146595aa619d759565a19209bd30f0ab21116b66ae1c50956df296fe401245d