Malicious PDF — malware analysis report

Static analysis result for SHA-256 db326647e7821132…

MALICIOUS

PDF

72.6 KB Created: 2021-09-19 04:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 249b4590e25f9360a065a80f07a19298 SHA-1: 465d0a24e875bdf72eabbb24e2e8a06f23fd09c0 SHA-256: db326647e7821132f36e15c20f76cc6288f494dc6b932abc833f7e0753bab0a2
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://alnahamgroup.com/userfiles/file/59812378878.pdf In PDF document text
    • http://grandp.ru/userfiles/file/junamonaxime.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1614089ca37a2c---kajeverafijosefogupixotek.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/58367901314.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/95727043460.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/73193ea427eae9261f9d8a94e29b884f/24143037376.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/94944252467.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef509cf753---gunavekufogo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146525f80686---17244296780.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/nuwajesumu.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/winaxubuwusizelu.pdfIn PDF document text
    • http://rem-proekt.com/f/file/puxakodafukolewenefob.pdfIn PDF document text
    • http://effekt-film.de/files/file/26418090915.pdfIn PDF document text
    • http://hainfelderteich.at/poromoxipujaxex.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/pisesorawaxajopesatuso.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/99914641151.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/didojiseluvov.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d2f71c4c06fed6a7324e46e8ac233b5b/436096584.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/kijufekowesozilunevadojo.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210917_9A43EAF00AFC90A9.pdfIn PDF document text
    • https://oasis-travel.ro/files/rerodotesajekopupamo.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/58886530422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=xperia+weather+widget+apk+for+all+devicesPDF 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_off0000b5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5DC 17504 bytes
SHA-256: 93a3a29547f95072b4404bbbd479e8cfb2a9ba50da4c49237643a612b81920d2
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 11048 bytes
SHA-256: 25112b25fcdba32cb71ef8dfb2b9c97030f270cfd6787525db7348ee8f72f3f0