Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2d44dbb1c7528f…

MALICIOUS

PDF

95.0 KB Created: 2021-08-06 20:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8e707a6ec2121b4e98429f0d5f77729 SHA-1: 69e328c027df7361c2f17699e975ea265a2ed5ab SHA-256: 1d2d44dbb1c7528f6476c1d1f5261ae2e45b1bcee1a61c1e2d7a9d1e34aaa149
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to further malicious content or downloads, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=suffixes+and+prefixes+worksheets+for+grade+5 PDF link annotation
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f79e335e6a6---bibuwuweb.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/4008691490.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d24f5cc39f---71087724960.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/74434252647.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/n5r6ik66kt8ag0aobv96utqs02/58095529347.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/sifevuvukabifenewawak.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/ketur.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/40572569959.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ipbgq9l4tdv7ib4oa9f3c5ftr6/18187311725.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/52355700656.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a86d24f743165394c8c98a5bd82d9e4e/24926600101.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/57340491690.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/56048969429.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cu0eiqq8qlbhrnv04jejt3gom/85518680354.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074891d22b86---67787397128.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/79850986633.pdfIn PDF document text
    • http://gilleyfamilyreunion.com/clients/6/6c/6ce887ac6ce8bbcacf46524318b1f362/File/37937510791.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/555019601.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609495819aec6---91982867990.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rrnsjl6d2ogjmmkq6s85gs0107/77898199749.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d48368748---6052833758.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rixed.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/vatek.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_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 11320 bytes
SHA-256: 79d28857455f11ade0738f51b34322dfed8d5dba53613420bed2d53856d81002
font_01_sfnt_off000126e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF6 17644 bytes
SHA-256: 91def162cb5db653c6f0c3e225805844be1781c580bcd257458a02dcf7a83f50

Open this report in the interactive analyzer, or submit your own file for analysis.