Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d5f304f49490c1…

MALICIOUS

PDF

88.9 KB Created: 2021-06-27 11:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6c4131d6e2f3abf5b0f20a91b1f01191 SHA-1: 5f97869413a56a27ce5870e1f505a9c956e52f18 SHA-256: 02d5f304f49490c1d44997fc20c89c312296468190e2607b9c525579724a8b96
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm, with many embedded URLs pointing to compromised CMS upload storage and disposable hosting. These links likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/lmtnfak75duhhfl0v5dn8ast4pmtgae3/93674557802.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160beada3af3f9---vizozabarubadulusu.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/78019941311.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7fc05bc8a---sovifukuze.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/vaniveli.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/73428760340e51d3cb04f44f1fcec904/jekuxaduraluwuxapasukemu.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/90ffd5b162034eaeac08cdeb7f1ed425/guzavobatudulutoruba.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/79597313470.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ffb86637a---84334048582.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/69823922800.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/getujelafugivofunovem.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607086dd2a7a2---95642448379.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/27874432516.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/jogudezozotasadegeku.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b748fedb97b---23856614100.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/0fecca8d6ac8af1ca6fb78fff711f4c7/299819605.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/peretuzokekafotutikafuram.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/5ff541e4d826e2d50be6c9b004511b55/81179709233.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/77440338932.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5281d07c---wifalofinasigox.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7120b8949---vonivek.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/83357044406.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc9643dab8---xefofufotuvotuja.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/mnmmilhgf6n8amgsqb6u0l3sj0/15938990850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=current+stamp+duty+on+propertyPDF 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_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 10660 bytes
SHA-256: 9b001e4909e76475a081616a2a4288f58076eab501ebf0374df2977ae226a719
font_02_sfnt_off000127aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AA 17640 bytes
SHA-256: 68b3f56e841e0002591d17cda9504568ccba657dd4cdf172e219f45a4461c7b8