Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fbe3199d6706a0…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 22:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 42184ef782a5d861bf896eae2708b0cd SHA-1: fda14f65c1d00068b945da6cde6b1360b3f15107 SHA-256: 94fbe3199d6706a0fda3378dba8ed923b6a7e86bb9fc1f210528f44f150ac82a
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://the-bom.kr/upfile/files/43328695513.pdf In PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/senufobazegutiwunuregize.pdfIn PDF document text
    • http://master-br.ru/img/file/60338995855.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d10d5980d96a7ca872fa601f39c813da/femelosuzuxitoxide.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/kaponupevuziw.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c1d18a477---20571759739.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b41c26ce758---34350370110.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a336cda697---790550707.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/94469765657.pdfIn PDF document text
    • http://mav-auto.ru/images/file/fibugirobi.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/2b30daa48c62a2f69c4f6fc2a3b75f0d/tegadilojitodozig.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/4057309748.pdfIn PDF document text
    • http://planbmedia.hufiles/26605570875.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c19a763134bf37a0b0ae1f71fdb13f7e/3054212072.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/vetaxelaxajudogek.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/56638031549.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a5cc1286---11581640974.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/zapawoledararanubepa.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/80901527837.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/cmqgucd59op1rbf6meq9td9bns/fesoremukuzu.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/wokegado.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/jurunumawikesonisa.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4c0d7cb3146a438863d0b052e596da9d/jabofa.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/a65e9f92c4c860deca1d4ae438b8acc7/82088742715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sip+abacus+worksheets+for+level+3PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 18716 bytes
SHA-256: 1397bb38dda6f0b197c3526666865b12d3db2a457f92bca85565056a660294f5
font_02_sfnt_off00012c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C42 11204 bytes
SHA-256: 146cc12efef7623d13d3875663913c3bbfccc53551735429c8d1f323c3af64c9

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