Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e56069a5c77668…

MALICIOUS

PDF

70.2 KB Created: 2021-09-25 12:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7723a6b7e27d31c1a142759957dbe675 SHA-1: d6b2308ce7d8b62ad7c6466b5693035c013cfc3c SHA-256: 27e56069a5c7766864b2fb7592ade5b4c4e66cbfa468c7593a5a9dd2413c3c02
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, indicate an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=friends+the+one+in+barbados+part+2+full+episode PDF link annotation
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/333f70209d29a496289c0c362a6e789c/litudawowawawetosog.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/tifoj.pdfIn PDF document text
    • https://noddy.nu/images/file/jabezelenawuvukebifi.pdfIn PDF document text
    • https://arerp.kr/data/file///fobafuximisonodufediwezaz.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/wixawojitaridujorigalefad.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/xepilo.pdfIn PDF document text
    • https://shunnasato.com/86995447018.pdfIn PDF document text
    • http://mobitransjogja.com/files/47745500561.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/jusosuxogopuravepox.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/db313rvk5rm7hfsht7blghsqkj/navitujibobebinugog.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/vamowexajatexite.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/33989396891.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/memugodixosevuveruji.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bd669333d2d6d53766b7f80f8ffea47a/20821879050.pdfIn PDF document text
    • https://cityface.cz/res/file/97751396006.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/34493133573.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/zegumoxekuzevud.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/ruxaxuxida.pdfIn PDF document text
    • http://deltools.com/userfiles/file/48547732527.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/44242655156.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fl3jc1qtfd35rcc9002t1cfh5j/94411467476.pdfIn PDF document text
    • http://kustari.net/userfiles/file/xunizaz.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/xaxesigirevovofukezavinod.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/86670460000.pdfIn PDF document text
    • http://adamex.ukrkarta.ua/fckeditor/userfiles/file/2730269536.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_off0000b32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32A 14596 bytes
SHA-256: 5647c40652fa950a966277660f49134296c2406a3d8799364792f84aad36b3a4
font_01_sfnt_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 10932 bytes
SHA-256: c9936a9617bac43e5c7748c586465a68469f046f150bceae9f4e201e494dace8
font_02_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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