Malicious PDF — malware analysis report

Static analysis result for SHA-256 030c10bd223fe7d7…

MALICIOUS

PDF

85.6 KB Created: 2021-08-26 14:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4bdc7c449dabc2a08bea05cc4917b89e SHA-1: 95a8b5ce249fc27216fd39222561ee05f19f0b05 SHA-256: 030c10bd223fe7d73b8ca4310699f66f3a3da3c82517c1e096dc49b78eb52c0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and compromised CMS uploads suggests an attempt to leverage these to host malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6efa814150---64840524764.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dc1d4f22b062f7f89f31667cfdec6ba4/vituxaladoxomifijuli.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/kujanilovemokuwivujuzevoz.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/rugemawawibisoseze.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/fixaduredosijeduram.pdfIn PDF document text
    • http://ibb-online.ru/f/file/febora.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b79e9a5c2---jopuma.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/9479052263.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/mumokosorikopasewosuli.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fe132d991---rupurakukif.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/39960be1fda96bbb267f01990e51a862/boxolirotularuzexegaf.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/20290903857.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/88289030868.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede192654ec---12439578248.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/631b56eb2475d97b256bb33e9289b104/xolak.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/68566418526.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081fdc57b2a2---purebariwefefubinopoxi.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d56cd7643---91465817190.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160da516b390c8---neditozod.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e84235c5bbb051d7029d5c31f84cf537/lezazikututeb.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a7d2a8a843e4eb2d79e89fb8ee80ddc5/zopidavajeti.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/dec8fb84e1e4f5f098304f93335421db/beruk.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094504a1c4be---86185927503.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad61ebdf21e---72021247904.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/jamono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dictionary+by+letterPDF 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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 10312 bytes
SHA-256: f84dfcc7737096151eed33f694c34ea5cea968140c8a85f5ac9374a47cca042f
font_02_sfnt_off00011ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 17128 bytes
SHA-256: aea6d011db3fe83f832dbda0ed8bb639dadf403231e57c90614f599d43860ec5

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