Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed646008e1bfe58e…

MALICIOUS

PDF

73.7 KB Created: 2021-09-18 14:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e488dea78176077a44237b226f4e3cfb SHA-1: 1e325d9ed223996a596f02c5c4ed080aecdd16c1 SHA-256: ed646008e1bfe58e47430ba0539e85002d67d07990f699f0a7d77fe72e292bbf
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures to trick users into visiting malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=coloros+11+features PDF link annotation
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343ae3dea3---fusevosejaxip.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/jugupopebor.pdfIn PDF document text
    • https://jetaime-shop.com/files/25050283420.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/guwolabana.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/11584730369.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/pulaworarurowulosagorofep.pdfIn PDF document text
    • http://millecolori.it/images/file/97436500094.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/sofuvilelowugaguzis.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/mujopifabasujojotosifova.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/karofubifowikuvakakajilu.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/safipazogumikapudanoxoped.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/zeriwagaxaveju.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/51765909816.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/tojuzaxape.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/wixazarofurufuxasepudedej.pdfIn PDF document text
    • http://synergyproperty.com/images/files/marejazuxuzuvunuxoguwof.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/gusadujodugebebo.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161441b5a6fecc---35221908554.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/2ab49c679028fcdad5b01237fee21fd4/5083577205.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210903071706_7jf3rg.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/jukovoxemifusozuwasuzi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/586a80335ed860c90a21a4806a6bf7c9/70055984643.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/nabopemofotakawom.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/19022743268.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/32394067314.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_off0000bf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF45 10192 bytes
SHA-256: 6f044b3e491ed485519ef3204ec5d9ab831c2f6914457f372211df2d4f9e2fc4
font_01_sfnt_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 16504 bytes
SHA-256: 72bdbdf0f92f199b6620831c33737dc583744cc205426b9a7f7aec2cadb28f54
font_02_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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