Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee0e0701cc7c189…

MALICIOUS

PDF

88.4 KB Created: 2021-08-09 07:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c9ceef2f76adc43e3066adba12afbd62 SHA-1: 1e776cc300a482923ec1b834618cd2ae47d1b604 SHA-256: eee0e0701cc7c189f3430b85144e00b9ecf2b6559f30ec6feb62140bfdd4dbc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous unknown URLs, many hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://55thocscompany.com/clients/62662/File/59177578090.pdf In PDF document text
    • http://akssert.com/userfiles/files/47905784511.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/kgt6o5t5t141f4lq0vrghdv002/marapokupoxofepoben.pdfIn PDF document text
    • https://people11people.gr/uploads/File/31262608732.pdfIn PDF document text
    • https://bnovum.hu/downloads/21399519552.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/19047524781.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/f21059f3cc2fb72f0dc09b61652eb242/21194141754.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/d86badd4f970bca388cb2bd9309d994e/58244236762.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/31856180.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070253370ed7---lewujukosimapotizazunumox.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/70ea608d52049d7cebede9beb626cd66/mixofewu.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/b4aa37fd6949a2f6033d455eb2a3ccc4/zufinej.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075c7c7d3a35---89952598149.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/60836523989.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/vawoposamapuko.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/80714760433.pdfIn PDF document text
    • http://ks-puyuma.com/CKEdit/upload/files/komugawimerelamulikoxopez.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1cf0125c6---dobafaxiboruguboxuxu.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sogejosagadi.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/7960380552.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/jebilafuxegebevawinosa.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609593c91af6c---23982170868.pdfIn PDF document text
    • http://chemicalengineers.ie/images/sugowa.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/83376817278.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fe713997---68679972965.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/vafujidavuv.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bb046d644---95189724072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+do+you+turn+on+a+beko+ovenPDF 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_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 10524 bytes
SHA-256: d7783dd3e655cdc47425297ddb594b36d85cba8f0569edee573b4bcb4f008e06
font_01_sfnt_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 17076 bytes
SHA-256: bcb9208b59d6422bc279341250bec1cac6270d08375888e6eb8c7fe332d20ef4
font_02_sfnt_off00013a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1