Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea7f09790d96b00…

MALICIOUS

PDF

92.8 KB Created: 2021-06-12 02:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 014e84619699ffc3a6cbd561107f89bd SHA-1: d7f655aa80c9ffd3613a29b1630ca2e51fba04ad SHA-256: eea7f09790d96b00f8dd5bfc19c125f3176dcfdc6e5e583ee79356f131d577c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/uplcv?utm_term=apa+in+text+book
    • https://nsck-cykelmotion.dk/userfiles/file/27195991539.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160abd8faa648e---ribakaranafit.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9308c83d9e994e7b54b4fcdf639b4310/57270962956.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cb43eaabd---55475894871.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ace6dd081---88406352392.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db4bb5c85c---17463315838.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607992b35580e---vozewiju.pdf
    • https://kovosluzba-praha.cz/res/file/simevibidekek.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606db57951ef0---86681062568.pdf
    • http://geoplan.su/userfiles/file/fosuketozebamapawudadodo.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8a1bb4af---47703705018.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/50284670628.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f48e2bdcaef254fd186035b0a03908fb/38488204845.pdf
    • http://nandeestationery.com/userfiles/files/warazimofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f7f.bin
26aeb04ccd1bab76da1d64df8510a14c847dda41baaf7b782dd21b38485942b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 4768 bytes
font_01_sfnt_off00013fcd.bin
eb1f0ad688b7dab8e95f8014665f09b6b5c3fcc89f81fe8eb846eaae08e8331e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 11332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.