Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0024f7e39bcc5a…

MALICIOUS

PDF

71.7 KB Created: 2021-06-23 22:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6da65224684e416921ab6cc77e9c059b SHA-1: 022abbd6c6bbcf12f306d6d88c7ce19c9ed3327a SHA-256: ce0024f7e39bcc5a1b31b050e9d27bf8570ef07c8df3fe191e2b16b8b85e3718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous potentially compromised websites, including compromised CMS uploads and disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'law of property notes pdf', likely to entice users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://careersourceokaloosawalton.com/files/public/morirolurifuvanimelixeti.pdf In PDF document text
    • https://jahanchart.ir/data/files/file/rukobanileped.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/belodikeb.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/ddf11cd259a800d71c306d5342ffc42e/zawakoxizizuvexek.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/38334506694.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/4e1682dd9ee654d72d8dc525ff3f1abe/45649530688.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/zobin.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/fabuxovumugaxu.pdfIn PDF document text
    • http://drironcat.com/images/file/kutamomixira.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6kmr3gv06o6feicl0p8njo91b/penukuxor.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/regixiniw.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/27d06f4e5cdbe0e67fa7145653311cd3/32628711106.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/xagobipopafirale.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fe946b8ac---69286945195.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=law+of+property+notes+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 5140 bytes
SHA-256: a7bebefb32479707ed8ecb843c9c147ea4b22d506a3358b8fc54c82f039c657a
font_01_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 10856 bytes
SHA-256: a7f84ba20f017c0f0a512355212abf8ee27c11908525f91e83facd8bc680b662

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