Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0392ac99efbd67…

MALICIOUS

PDF

97.1 KB Created: 2021-08-20 22:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f40a5d1d31da3a4161a3ef69b0c1a10e SHA-1: d51600870817418418d66c00b7ea95533ca86133 SHA-256: aa0392ac99efbd672fac2420ea0557e1e31945c931cd63d33e90c1bd33dfaba4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external URIs, including one pointing to a raw IP address, suggesting an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://argol-editions.fr/userfiles/file/wokogezimelavibiboke.pdf In PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/bumep.pdfIn PDF document text
    • http://mousike.it/img_ins/files/67963157273.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/33846885101.pdfIn PDF document text
    • http://darienhighschool1961.com/clients/6/6a/6a5b14ca9cca6c9c7811e238b5dc87af/File/44807934272.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/45725461177.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a822584cc59---xilukefifumefalo.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/wixonufinugudix.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f7a45c3d09eb788f2f3cf8e3a8789046/nariredipimugeruwej.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/81007490362.pdfPDF link annotation
    • http://raczcsalad.hu/files/90337080478.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3750a5df1---77814082890.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/gtbqmfp9v2jth0fvedj57vm760/nakevoropetowurelox.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/85320294891.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3ff37b98ac08b9cc8f13a237999776e8/63072090020.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/35924698167.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b82b2a6919a---7406009446.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e9362935500---59345715433.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/diluzolubawavobededijojox.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b73026d4d86---85729495989.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/98227267884.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f00b7d2af---77384173166.pdfIn PDF document text
    • https://kimcert.net/E/file/nopofivadop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=que+tan+buena+es+la+caobaPDF 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_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 17880 bytes
SHA-256: f7f9ab201f517d4754dbfd1a1d46635086d8ef2477934a5bb45ba0e1f9f99c82
font_01_sfnt_off000146ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146EE 10328 bytes
SHA-256: 8523cc70215364bdd030ca958c3994626322f1748396fbdf7aa8907902f0a81d
font_02_sfnt_off00015e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1