Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2dde9bab14adc4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-16 21:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e545db0c8f2b751a6704e258ef8abbc2 SHA-1: e2546977f84d36d2ebed21bee6c6ff56ec3b6f9d SHA-256: ee2dde9bab14adc47983572057de769737691e4921a1fbfb2d38342b28b416c7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=best+cast+screen+app PDF link annotation
    • http://chochosanencino.com/uploads/files/83752210185.pdfIn PDF document text
    • http://taigesw.com/upload/files/19867958512.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/gexafibafe.pdfIn PDF document text
    • http://cocoal.com/uploads/file/rorakagaderulokoduwinefe.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/93069226286.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4b53eea8---rizupivenuzuxarevukosix.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/petonisolowe.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/bojujilanuvugupiruguf.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/59041993375.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c47d077c8---wazuruvege.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1cb4a1379---1135191909.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/23703425604.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/tenikitogofuk.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0ff42904c8cff55bb870336612d56ba7/jegomosenine.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/40965193325.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/buwaxi.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/9198063226.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/71861663432.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/17583589625.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/39611845600.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/xakemafet.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/47872164175.pdfIn PDF document text
    • http://vodova51-53.cz/files/bogafukamifupaparafukefu.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/13324613932.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/27827316292.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_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 17780 bytes
SHA-256: b920496a5b93b88521ad72ea8b047b6e4656cb5f12aacfd6a10f577f697935aa
font_01_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 10160 bytes
SHA-256: ac06b23b2df22034a49112ad9171acddb49edf5c4fc56585b4517aaf667ed8f1