Malicious PDF — malware analysis report

Static analysis result for SHA-256 60670b100b2deeae…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 11:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 85838620cd9f492c5a212b1c584829cc SHA-1: cb2319db4cc9f6008425450b41e29d333db8e008 SHA-256: 60670b100b2deeae51d49fc9152d46501a4f4f3216389185355713a15b6c5f85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://philabc.ru/uplcv?utm_term=triple+triad+android PDF link annotation
    • http://canxetaianhduc.com/images/file/54524046335.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/77446538681.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/84696785901.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/purez.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/5faeeeeeba4ec240d0ed23db9c5515c0/95313710715.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/xomosojasulefotugukufeko.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210909042327.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/wabivuwesolu.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/15d0de86043f7453f5c9c0c452e6bd2d/vuxelomewete.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210912072024.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/kuwerixa.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/nonezubavuke.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614222f476ffe---vakipapapo.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/62226452170.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/12829084602.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/79820315507.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f63cc4395---fovisozegemuvujorekameref.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/gupifobo.pdfIn PDF document text
    • https://ikansambel.com/contents/files/34968007048.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161422943c2619---83309115206.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/56e84469b9e74ba1fb49091bfdd3f1f2/zevunafodoxipipubapafati.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_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 18936 bytes
SHA-256: 3e1b22dfaa63f982c92e7a69ed5d7afbaf0ded470ba68a4b5e634f9eae0991cf
font_01_sfnt_off00010fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E5 10180 bytes
SHA-256: 302f44668cd9794e5eb8f7c7d97cfcd23edddf5b33439bc58e1d84238f720b24