Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7df2a62de6f48b…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 02:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 93cd4552d65cf2217e0698ed72e76617 SHA-1: 58605bfdf176eb48d967f7bf34fe4eef088888d0 SHA-256: fa7df2a62de6f48b15dbf52652cc66fceede76ef76bbbc3cbbf980407e79def9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://medvor.ru/uplcv?utm_term=birthday+wish+for+mother+in+tamil PDF link annotation
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/40076317870919f8a6ce7a8d349caf14/kobapupomevixeturufuvo.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/bokademikikewuju.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021822044299529.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160853cc84e5a2---fubexosifipufutadol.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/80432032163.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/sumewizupesufosezubijokik.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/ee1927daa418a50647d0423d28f0eb9c/77339181456.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f529f7405d1---89510077805.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/61973715480.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/furubotirotef.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607434d501e19---feramo.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/mefuvobubux.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/gazaxutafi.pdfIn PDF document text
    • http://myphamasia.net/upload/files/86909737565.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/pojadafok.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/fewejesalakabikezejobawod.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/18953866904.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tttif67u0fp7u6j6obd65bhljk/xaposufofano.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a413ebd9d2926ef3156a7ed997024c5e/5298725192.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/43fc20de6623d954dc0199169130df4a/xupotuseditoledaneg.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/zomusosagadumo.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/9pr1cc1u7sa2r7kqqvgik0phc7/49365265911.pdfIn 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://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_off0000d25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 20236 bytes
SHA-256: 5646878442f6878b32aba817f198cb910e828b0e8c5367ba128c12b9d82c980c
font_01_sfnt_off0001070c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F23 10872 bytes
SHA-256: 626390d100d9f860fb17c50f443d93457fc13160a833b168c6c85ac90fb95f70

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