Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0e4ee17798ca1d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-21 08:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bff341417f9cba251f85fe72e277888d SHA-1: 94a2286e56bb6057ecf76e4d682f801e798b91d4 SHA-256: 9e0e4ee17798ca1dd5435d109928b4e322fed8eb0269f645d1e3f426dad8214e
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8afce28ed---604714798.pdf In PDF document text
    • http://josquin-capella.de/download/54256004888.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-5/20210905002512780264.pdfIn PDF document text
    • http://ifap.it/images/file/90207406100.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/tiwiwedurijinakuxigo.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jenobedira.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/20694651348.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/nexalatulirufusosuje.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/zujidinuko.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/weris.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/81582976033.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/85224650936.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/3dd00a23ec3d6cd166fc717d0e9a1085/zajisivum.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210920_000815.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463c0a2ecdd---31642345425.pdfIn PDF document text
    • http://foxhill101.com/userimages/56067744061.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/76557083292.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/9cbe6064e50b08b2a462804b3e78a1b1/vidigizixujo.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c70aa22ceb---25222556912.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/i2cgbor5gq0m9nt4robs46n7bm/64261486087.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/dagoruluxolewexidif.pdfIn PDF document text
    • http://furniture83.com/upload/files/sifopop.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/forurajamukixakis.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/14499779288.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/soluxatogefuxudotuwolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=final+fantasy+legend+3PDF 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_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 17052 bytes
SHA-256: 0f3d16a0726b8d98d701d66425464303f44891441d5901568b4c58ce692746b3
font_01_sfnt_off000110aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AA 10572 bytes
SHA-256: 07ab421586ad26c47764257f038b1e275f63e13213e8aa4761f6bfbe96903e07
font_02_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1