Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cd7a0cb9b73224…

MALICIOUS

PDF

83.3 KB Created: 2021-06-28 17:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 88a7f2a211edeb810e662b29f0a61e6f SHA-1: 0621996373c7b358f12cd0de3668e00066a69152 SHA-256: 78cd7a0cb9b73224ea02fcf5094f7aa1ca53b99f767a699c2610a22f2d024582
156 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it functions as a link farm, attempting to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://crewmak.ru/uplcv?utm_term=what+does+it+mean+to+control+a+variable PDF link annotation
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/babe536185c37d944897fdda7dae429e/64371692740.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/i4fljhnqa7djaoq5nhkclfp3gd/97955084470.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/60290913058.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a867d4406---zagavexibox.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ktqk7okocomg7shljpl96mtpki/56020459169.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/99673258723.pdfIn PDF document text
    • https://amblamy.ee/upload/file/xebemobuzisajes.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5e5a1d230b65b543b23052ffc2462149/54953690579.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab73411a7f6---83395102681.pdfIn PDF document text
    • http://poorclarescork.ie/images/68682997670.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/f9ffplddl5n240f3ggm63fpagl/wuvivejedozoginoliru.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/brion0ov8qtl3mc06bp0eotuje/59032535254.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/piputumupo.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/q8nqe2qiuge9q899n0l12dvpp1/75114236814.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/garamusipovejufufaxokuz.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/xalefoxotev.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607910f4d4ba2---59770458098.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/45486646239.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c235012220cdabd84caa71570b88fa18/5598124915.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/96755860812.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/puboren.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/69309083737.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/59452721157.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_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 16680 bytes
SHA-256: cb038559d97ce2d43b939df6312f35ea70c7a89019fba9db4f5594ef3e47e32b
font_01_sfnt_off00010f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F18 10836 bytes
SHA-256: bfc5a6bf7a913d18f863b9550f4c651d09b8b286d6c3fdc14efaff990e78139d
font_02_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.