Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cdca42dca5b02c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 15:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1d5fc3d6f1f92c82434463f30bf0979e SHA-1: 0647b531eedac68b2fca0bdef9fa97b8e82d2b1b SHA-256: 07cdca42dca5b02cda1f2aac11acd8ce319ac03f123a13009c9a4acdff9dea9c
134 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 within documents. The presence of numerous external URIs, many pointing to disposable or suspicious domains, strongly suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://cructi.ru/uplcv?utm_term=hezekiah+walker+souled+out PDF link annotation
    • http://rotarylaspalmas.org/documentos/file/42520123321.pdfIn PDF document text
    • http://hainfelderteich.at/bawazi.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/kipirukilobusodasisipid.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/97860188776.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613334d962bf4---fetidogegadepetunib.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/5002596600.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/57988510433.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/xivonulavu.pdfIn PDF document text
    • http://12shio5.com/contents/files/subinewuvo.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/babusimokadiluwukara.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/jatine.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/51089583635.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xososakak.pdfIn PDF document text
    • https://chp-travel.ir/data/file/42434379880.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/fosupezaxenoxuwevi.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/86102258792.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/43301618445.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57425590139.pdfIn PDF document text
    • https://renetravel.ro/images/files/genebevume.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/28940244601.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/lanixarurimorituvan.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/66362303819.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109122027523551.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/vurabebat.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/daraj.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_off0000d32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 19248 bytes
SHA-256: 2455cddcfdd5d54a1b86c71b6947367c98fdf03f94f297293b4e4fa029df9a54
font_01_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 10568 bytes
SHA-256: 37b23faea6c7d20716a425862ca7be1d4996f2dd6d3aa98a682a86a72e6f862f
font_02_sfnt_off00011de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1