Malicious PDF — malware analysis report

Static analysis result for SHA-256 1154226619e3c4d7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 07:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 060e13b1e1caf944ed2b98e3d8236112 SHA-1: 9821451eb3f4275be2b28d7ee70248df41883bd3 SHA-256: 1154226619e3c4d72612cc7790f3ed8fe2fa881710efcad2acd7225a7bd85211
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL analysis point to a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=manual+testing+resume+sample+for+2+years+experience PDF link annotation
    • http://www.sctiec.com/up_files/FCK/file/71192323505.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/2jfgc3i9mtqdn8ggh3hd3jgrqu/73990316826.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/e5e94ef7ab96ea7ed422bca9cfcf2fb2/suvobudilonukemule.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210823_BE182AADB297671A.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e7773bdbed4---16742928545.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/36782459962.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea07e8aad2---31860518672.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/batopu.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021619211412624.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210704_165836.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/64844632669.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/235148432c57d97bbbb164dd1fed8a5a/jezijorogafazuvinezudupow.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/86332055359.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/56879461610.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/50298340469.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210730_7689D4658EDF47A1.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e49738d6cc7c1ed5b29ac1774d0539ff/37978714549.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210625020441911537623.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2f352f0ff---pezamaxiseraresosusalel.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/be29015a8efb68b8f76a0c3fa08d5327/20072197885.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wemimijuvonepumuletujigo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f28531a---20407320624.pdfIn PDF document text
    • http://midel.me/userfiles/file/sajonenojevotomakulodata.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_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 11252 bytes
SHA-256: c09baa199187a5201858288672c944e0d57f090c2915341b1ad64cc6ea903912
font_02_sfnt_off00011371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11371 17960 bytes
SHA-256: e55968706d5955b047d9a50563283cbd298b9038d10e9ee8e2e7847e95592630

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