Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02d55ecd0f5382…

MALICIOUS

PDF

90.7 KB Created: 2021-09-01 18:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6de9611cc540b5a4fd510aa77784a3f9 SHA-1: cd5b7846254d6235cc34a5ae115842b37a7b683b SHA-256: ee02d55ecd0f538277858648f340ead2b0a72440e7425259fa4e66cda1502e2d
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document is designed to trick users into installing a fake browser update or extension, a common tactic for credential harvesting or malware delivery. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, likely serve as landing pages for this lure or as part of a link farm to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://drafthe.ru/uplcv?utm_term=wanted+2008+full+movie+online+watch PDF link annotation
    • http://www.kickcommerce.com/userfiles/file/4148187274.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/palej.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/10610922362.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eca92ba4a---livudinuj.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/23393707385.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/35f66b54612d4dbc8ddae1d1a7dd02e0/xememi.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/afc29877b90e06af99cf250558b4fbd1/vuvuwufowepexinalefariv.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/57921165041.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210829_299EE2924FD0E505.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607664f251525---tivitonenadibubabozipu.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/70035850922.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/melomezejulinamuku.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/98945499072.pdfIn PDF document text
    • http://armanetti.com/images/lanujikozajegozaz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff5db58941---70966144617.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606db2942fd55---50046977020.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/123bf48899b3076e0d171192e144bb51/77637784104.pdfIn PDF document text
    • http://skncn.com/u/files/69708388293.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83763191858.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92524e77e---85679896252.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/tewijarokadovusotupub.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5ac31597b3c969aca117f54e5afb5dd4/ritorul.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_off0000fd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 17628 bytes
SHA-256: 212bf26346b13b54366a64ac47ecfccc3be5488f99b2186bef351123852798e3
font_02_sfnt_off000142de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DE 11168 bytes
SHA-256: 5ef92543d23bca52aac705eb807a7187acc8f74916e2395cefc32f35864f077c

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