Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6d037aa2ef90b4…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 13:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cb0635dc1ada98ca714fb5ee3eac1d0d SHA-1: 35c7aed61dae36c898bb10d6a1c08056eed2c936 SHA-256: 8b6d037aa2ef90b4eddfe937d0e2edb499b7dc40d1641c02fffc9005529b6491
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on compromised WordPress sites and other disposable domains, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://pixomot.ru/uplcv?utm_term=final+fantasy+16 PDF link annotation
    • https://franciscojaviermoreno.com/DocsCKeditor/files/pigiranewiwedetiguvanopi.pdfIn PDF document text
    • http://secretinvitation.net/images/files/dobekemipopofujigoxisu.pdfIn PDF document text
    • http://coumert.com/images/file/jejejukusipuwetokikimumek.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109121503378590.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/vakevurewe.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/97106620382.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/kapamiguvajadar.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/58734104450.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/76916992652.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1367429f7---79837561555.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/divekakape.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/27907075773.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/sesanaponinido.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/1543308334.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/78394512619.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/q3cvaou06nunlc3l948fhdicro/gixefajikofebozipa.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/tiguzuwosejenagakubam.pdfIn PDF document text
    • http://sptcrane.cn/d/files/nijupexure.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109121628465360.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/gukodegew.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614947fd7de85---jujijidage.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/42927061829.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/xiwixovozegovodidut.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/dezumesarutis.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c96707edcf---sudewulevilajagabimajog.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/28294751592.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/nulavotorupo.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_off0000b7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC4 16640 bytes
SHA-256: f1f09344028e8bb0df47f6cbaad62d6762e3559a94ee543a5a9387ab055d0d28
font_02_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10164 bytes
SHA-256: 3ea871efb220d5f0b0d0ec3baafcad9a2ea23d5c76f6edbffe2b03bcc7b72d7a

Open this report in the interactive analyzer, or submit your own file for analysis.