Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fb0c7d6e465da8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-24 05:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23dce1c344eee8110366bd9cc350123c SHA-1: b239d332c4d47de8ce37a4802581e17e9374ead9 SHA-256: 08fb0c7d6e465da827c9002ebe163fd1e04aceffe1d09a603b382b906b382884
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a link farm pointing to multiple domains, identified by heuristics as a potential phishing or malware distribution tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns suggest the document is designed to trick users into visiting compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://elektrostroy.kz/ckfinder/userfiles/files/lomidepasamorepajizo.pdf In PDF document text
    • http://restaurant-lyons.fr/userfiles/file/26590436606.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/dipamovusabaw.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/3318319050.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/63135787434.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/58e3b82fb6e2f63e06befb44b13c9c5e/38564672666.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/61292305981.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/35331908438.pdfIn PDF document text
    • https://arendic.cl/files/pozepejetikojorojoro.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/narotobamig.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/43037579880.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/43408119379.pdfIn PDF document text
    • https://mkontroll.hu/File/xenejufosuxelenozenusi.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/44559357749.pdfIn PDF document text
    • http://state-lithium.com/upload/files/gavemulideji.pdfIn PDF document text
    • http://asliev.coco1490.com/upload/file_folder/file/75715199487.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/85411415049.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133b428de54c---95385341854.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/78518742291.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614bab9b1cf9b---nekiladisinizaxixitisoj.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/salijobam.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/lorapad.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/33385265992.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/2e74ca9a652825cdfbe1869e1b87166d/dekegozobamorowor.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/68428717322.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/65395006228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=setup+exchange+email+on+android+outlook+appPDF 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_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 17472 bytes
SHA-256: daeb0daa4d7373cee452e371fb20adb1c9865c8d63d72594f8a493ed3ea365e9
font_01_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 11164 bytes
SHA-256: 159fccdef503c3aadd06f0d90fda20ba3174676f194913cf50702efbeba39212
font_02_sfnt_off00011bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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