Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c46e70bc8484627…

MALICIOUS

PDF

86.6 KB Created: 2021-06-29 05:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1fd6145b1eac58bdcbcf3652920ca0aa SHA-1: b5dc45a50d2b41c8bf4ae8a02d1cc0c281219f3c SHA-256: 7c46e70bc848462775ff23c2caa93ace42c644ddcb30ce917ccd91951af2ce5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This suggests a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093d390d6dad---60704048658.pdf In PDF document text
    • http://dioceseofniranam.org/userfiles/file/gifobizibawovisi.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/e8c3e28644528e7bfe06623a4ae00e57/fuwezutatekuj.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/jkjei3sgbv7oq1rl749mr2jq7q/xemupubozazoxarafor.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/b6516l51rp677lb36cis9hkrr7/logewemajajusipe.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/vigakefa.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab67a779c2c---foketozonujepibabe.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ad66319cf---50510994350.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/66112859402.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bufogezofopedi.pdfIn PDF document text
    • http://charivne.info/images/file/64931507516.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/98deb310bd78f7a71b615881fbf0fa06/lolovotekakolik.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/gh9j5b928g1o2tmbj6e91jtte4/muwin.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021618130489336.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/begtr14caij5l43qor07u1c9q1/nazisepuz.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f04263a1---vaxuravavotubebux.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/2212fec056e2cdc10a0364ddfcf75ad5/zanetovigabizirulebuwa.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b552b151a0---fiwataribipomebepeve.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c10baeed1fd---71650384863.pdfIn PDF document text
    • http://ellerbeefamilyreunion.com/clients/874543/File/60882835864.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/86260671993.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0da4e977cd10b61924027575ac0f04b0/vozunepoxuxuworilu.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/10832941fd1dae3d6624dbd767fea586/fubokorijoxoripugewebut.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160707fc714944---ferakixokavi.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/09047b0e41a2769641238ad72b096c3d/rowonopegexojaxova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=lord+of+the+rings+conquest+ps3+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 11360 bytes
SHA-256: 10c835f932e1e2eb92110ccded9f57ad6e2552a514ac3b8de58544b3ba2ab014
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 2972 bytes
SHA-256: cc3df57f80808358ec12eea98f57041b67e86d1852e0bf825fd18925e69a79d8
font_02_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 19356 bytes
SHA-256: 7b5243051ced7dcef9eab369ef9fc5467d1ccc788a4c3e067d0b3f952d75b47e
font_03_sfnt_off0001345c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1