Malicious PDF — malware analysis report

Static analysis result for SHA-256 3467431e721d5dbb…

MALICIOUS

PDF

88.4 KB Created: 2021-09-05 02:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3566d0143cce637d0490c6dcc088cc9 SHA-1: de5649037425521407ecf0552b3ceaf080ee250e SHA-256: 3467431e721d5dbbf30ff5b97dfa986656fdb7a5d708723b97d04bb10d87b205
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/voxilan.pdf In PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/atqmtlkvfbtps1mh1kva749l5n/33788397282.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/36893938256.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/894d024bbfbd1c6305b4a0f21d5ac009/14837569720.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/tupurofevilegakurugujube.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/potapobutewojuvogekenu.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/finamupafekitogu.pdfIn PDF document text
    • http://zae.me/datafiles/file/nalevudisoguzeduxome.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82c945f37---74453712733.pdfIn PDF document text
    • http://thegioioto.store/upload/files/zunegagajalugozupox.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f77aea2be.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/wokijurad.pdfIn PDF document text
    • https://bselink.com/userfiles/file/miwegiwajifamijilibet.pdfIn PDF document text
    • http://woykoff.hu/upload/file/zamimifumawemud.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jk870rc3ighrkns0jjfri0vqmb/dosozonidolibizusejosag.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608285042d304---luvopubiwiwe.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/fimebesonos.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/27036157996.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/i1kfeo06jembh695l28ocfubtv/70814124852.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9721a6816---92176309820.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/setonas.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/kiwurozunejepavi.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/77051335521.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e18668ba0c1---29203972617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=life+cycle+of+cycas+pdf+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 10572 bytes
SHA-256: d6285603f63b994340ff29c645b8f9abadfa439f1a4a1b3a664ab35e5bd15254
font_02_sfnt_off00012303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 18764 bytes
SHA-256: d8d8226977b7c810cfd6034f30f4bd5eaf22ed5e0c098f6ab776b2d31b685ba0