Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea61bf2449a201fa…

MALICIOUS

PDF

86.7 KB Created: 2021-07-21 22:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5359bc3e61c48da557c2ea65c33de008 SHA-1: 3e8b8626b8ecf6d83f58550e2364b862e2eb54c8 SHA-256: ea61bf2449a201fafd68a60ae61c439a48b12b222a3a5c964b934a7d3c3b0156
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://wrd13.com/force/file/54041097313.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074db3e79dd0---46627478924.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/loxegitozapenevobanesoge.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c322dee41c---dejabidumo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/43brc2gccjpkal5u2remi5fk82/59680673623.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e0a9e035f2244931e2b3f525e0c0b880/dudop.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/gifurekirukejupoke.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befb596c24f---pogaf.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/2f6dca6ae89a6bf4ab827a5beff3d771/vozuselinanozipejodowib.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16268400516678.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/22718071499.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/28344414644.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/35632808601.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/94093565012.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf6cb7573---guxapukin.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160849675151cb---jepofu.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/rusige.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7b7ead92d---bodorajebimafo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/61250b6672d6218b20a94de7310bae43/35749033931.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcfbfaff48---zivuselaworofutit.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021062606243086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=3ds+emulator+android+biosPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 10724 bytes
SHA-256: 08cedbe5a2e34e8a01fee4f0500edfb15d710605757a5befc353daa1c6057e8e
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 17860 bytes
SHA-256: 39fa22c88594b49668f50c5659a3955d183456b1054281118bb542cee7450184
font_02_sfnt_off0001352c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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