Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eb7eb560adb4f2…

MALICIOUS

PDF

76.5 KB Created: 2021-06-13 23:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6b38058b1a36e7f1ff504264b9953c9f SHA-1: bdef81550b5f8f32e0d39b6ad33d42a13c660e66 SHA-256: 79eb7eb560adb4f216ec478e752c7f11e577b58d171e0e2305566609af58ecdb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a password-protected archive lure. The document contains numerous links to external websites, many of which appear to be compromised WordPress installations, suggesting a distribution network for malicious content. The presence of a URL with 'ciso+pro+cracked+apk' in the query parameter strongly indicates a phishing or malware distribution attempt disguised as a software crack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=ciso+pro+cracked+apk PDF link annotation
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9750e5aee---tomixupozope.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/562a938c5f16801a05b66f7ec6f10cdd/gazokosirezifuzifixefeb.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97df16623---70261081701.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3fecd7d3---86295238821.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/1572417702.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/69157d142a3a34ceb8cea4714cb7e178/gewebevade.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/fbe850a1e73ca277dcc41cc9e5316012/xusogenavez.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c42ab273ff---70236052311.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/30990778582.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a3vul93dnv2ucortnq9t86oqu7/siporebiwewujege.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/zazide.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/kowasunuxegupe.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/84884064071.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a937a0602920170a1eb27c50538c7a06/56371267855.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/figuwusamabuxima.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/9596577398ffba26db1acf74e7eb37c6/73195699372.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/zowezivuzovuravujitusom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd5ea0ad27---juwivij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 5004 bytes
SHA-256: 77e21b4335e4f8d8c42ad02ecf4f64b2ff525366d24b989a08c98cbbfd8b40ce
font_01_sfnt_off0000fedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 11292 bytes
SHA-256: cc488fd9bb9eb39680d01e60b361ccf28ce190bda9776644ad21a4d5f74374b0

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