Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ffade8cded407d…

MALICIOUS

PDF

205.1 KB Created: 2021-07-01 23:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5d39268b1b7358290be7e9d1999431ee SHA-1: 8c2206651a306ba2ccea6096da7651dbd01f72d1 SHA-256: 92ffade8cded407dfb4d2043bff4d937b33dad4aa393e59a1619c0fdd9e9c842
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that contains numerous links to external resources, many of which are hosted on compromised WordPress sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to evade gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=fixed+bias+bistable+multivibrator+pdf PDF link annotation
    • http://choinka4x4.org/cms/files/file/wixidizixigibaka.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085baaf39f11---kexedigejabez.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a38034a86---depomime.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b15b1d332ba---3048211160.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160bacdfe1d156---dinofik.pdfIn PDF document text
    • http://dzbnf.com/upload/file///75899021847.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/j0svagqtmtvir55g5rj6ovi882/6095219091.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/zogijebesejag.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b3512cb60e71fc8bd9544837add5a2c4/82944073190.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/10336387369.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gg2g1hjsa7odl978m1258ce8og/61890677686.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a729100f9d4---dadunifexipimozugorexon.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3f786c988---87971347014.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/59c2b8f8a66f9002814843e4f72703d3/mujesak.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/65891184437.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/jamix.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/pejilonebobetoto.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/24137786221.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/58981073915.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095f8c4963a1---koris.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e5a593766---sedasatomomupaduvoke.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/67a004da857536a6ad7744f1d21230ed/jelotimasefanak.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/laxajosa.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_off0002c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1B5 16644 bytes
SHA-256: dbd245aec66002bc38674191f3900053bbda8ff5a51f86e28b13b093597c70c9
font_02_sfnt_off00030ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CE8 10940 bytes
SHA-256: 0f6cb0cf1fbae0797a23def760e03f1d96f6daac3c1724ec4bfe3fc46f7f3f2d

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