Malicious PDF — malware analysis report

Static analysis result for SHA-256 693ec6d11c0496ec…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d6d5e96271e09e8e579b8bc39d8b9a83 SHA-1: ae264deec8c6c4e9677f667b9a2ab9d1b50eddde SHA-256: 693ec6d11c0496ec80f196297cdbb069b2b4c20f8a9a640ac97e8ad616b401df
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to compromised websites, suggesting an attempt to host malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300bc8f4047---4400753462.pdf In PDF document text
    • http://novichiha.ru/pic/file/98022411790.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/barobidariwo.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/gisopatuxajesurenezezulo.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/1874d0e4c35b8a20ef59417583c845e0/fefixanolaziwizigiten.pdfIn PDF document text
    • https://resicolor.com/upload/files/fubojesimogenotowuzanibuf.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161402ba013611---45170419801.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/sorojoxemasezojor.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/33958453701.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/gujovodomirifata.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/tudipatan.pdfIn PDF document text
    • http://modern-pro.ru/files/file/39525387938.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137228205803---35693299420.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/68881836597.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3acc0cdb8---xipebipivokusezivetubom.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136eec187281---8659072157.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/wutoromomixafumil.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091603453557.pdfIn PDF document text
    • https://magic-ray.shop/uploads/files/mozixesoponenisepasajij.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/kipisosenofolusabipiv.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/83458087556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+come+out+of+safe+mode+in+mobilePDF link annotation
    • https://b2cdemo.tickets.com/content/files/76158369851.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_off0000d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 10856 bytes
SHA-256: 2dc426f522ebaed8a5dad91def383188dd11c14322a175ccf48b6ad841351edc
font_01_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 17992 bytes
SHA-256: d50c036c6843943f9b31af3ecd960040a39ee3eeda09d00c2005cffa5dbb45d6

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