Malicious PDF — malware analysis report

Static analysis result for SHA-256 9700f3b52f953fb0…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 11:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ce45ca46bbf328d28e6d2fa36c87fe2c SHA-1: 6ed565ce8e0ac9c83febb506d9e0ac99b1d6febd SHA-256: 9700f3b52f953fb0f7029ec8835442ed9f9b441d2a992bde7c35c37823a7b7ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, a technique commonly used in phishing campaigns or to distribute further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links on disposable hosting, suggesting a malicious intent to obscure the true destination or to maximize reach. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ikitellirezistans.com/upload/files/72849308139.pdf In PDF document text
    • http://slkuang.com/v15/Upload/file/202195151553880.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/kosovujawafaxarubido.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/88904535866.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/116430846.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/86086678941.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/29499197682.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/wakikomobe.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/vekalivuwizopasojo.pdfIn PDF document text
    • http://lachina.cn/upload/file/ripazapotuwekin.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/vurepapajatiboguzosek.pdfIn PDF document text
    • http://rrarental.org/upload/file/27103943340.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/nukonimujejipekokene.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/fusufesiwo.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/57965228073.pdfIn PDF document text
    • https://swiz.eu/files/editor/mumerutikol.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/jigijuvijojudasa.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/vikirewoge.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16144743491b76---37730197544.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/zeduginukaguzosigixok.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/godezipezupefimuwobubed.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/g7je2r4fl22rd1p7hnlr0snprk/rujilutipo.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/96722168361.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/vidotejagijupilalaximup.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/43132236329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=thereby+in+the+beginning+of+a+sentencePDF 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_off0000d8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B5 10784 bytes
SHA-256: 348ad2cc99c320577daf8d89cff82a6200ffb3818a46642f287bd8e69c0767cd
font_01_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 18864 bytes
SHA-256: 0cd30522ea1b516c3b85ee7db296924be87b79129da119deb1a2bccf806e08da
font_02_sfnt_off00012300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1