Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fba2319b75b4211…

MALICIOUS

PDF

84.9 KB Created: 2021-09-04 15:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af4ec86391c442508648d49ab538cb73 SHA-1: 858a18090313149a828dfb6cdeb16ab222dd09e8 SHA-256: 5fba2319b75b4211e82f9b98eb51a22ff5ef658426fffee7dcde4b4cc9789874
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the document is part of a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mm-podium.ro/userfiles/file/64586610765.pdf In PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/52153b3b8afe08438f9ccf7bc42e63d2/jizizipuboxed.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/kedixudidibeso.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210702_0E0839E9FCE0BDC3.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d614927734---93565745234.pdfIn PDF document text
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/95284974415.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/45088534968.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107df2722cdd---98751807593.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/zulesiwitekemulenorup.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2ef950330---pawolaroketa.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2b0050c9b---vonisuwusivemimo.pdfIn PDF document text
    • https://aksusu.com/upload/files/sivorinukiji.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/fadivedamunemamaniwazi.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/71097848236.pdfIn PDF document text
    • https://slide-bearing.com/d/files/rotekirinav.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/60663409912.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/jc8t4mln1v1djdrt7620ncp6v3/17703878348.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/72066787801.pdfIn PDF document text
    • https://yuss.it/file/93817274524.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/reson.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/fujakesepo.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/509ca94df265310ea5e5293addc8b978/guganobezoj.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105981b78622---kuzijakavisefaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=flue+gas+analyzer+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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EA 20568 bytes
SHA-256: a1fe4b8e5ee28a118e661cf9530ffafbb639fe546b16242aa83114e484fb4323
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 10616 bytes
SHA-256: a1784f2e0780d30f87eee5d5e5e9519919fe0fa8ee9cdb8f2af8ec5bc1a101f6
font_03_sfnt_off00013032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13032 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59

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