Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d0a0b4ec3917ed…

MALICIOUS

PDF

75.3 KB Created: 2021-09-27 01:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 07a8568bee7f42bc9ab7d2c4ae392da2 SHA-1: c499be04f19493f3012be6a1ce985f70d60b0050 SHA-256: b3d0a0b4ec3917edca174b644bc0dd70703ad6b285ce96bfeb39cfbfca36dcfd
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The presence of embedded JavaScript indicates an attempt to execute code, likely to facilitate further exploitation or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=wandavision+comics+pdf PDF link annotation
    • https://jung-yeunjang.ch/userfiles/file/nigomijaporamidosujixuri.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/gewex.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/febunajodukifik.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/daposobevilevelu.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f91614283ff1981a76f298dfcd972b8b/20545686736.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/47800831538.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/gevipew.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021920751104974.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/73020965205.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/18796843982.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/xasegisaregivifoki.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/15566642025.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109131747041066.pdfIn PDF document text
    • http://gibisch.com/files/files/litilenufukazazawokivujes.pdfIn PDF document text
    • http://tatooazh.ru/files/files/bekigozibe.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146b51606411---76257105285.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/diwafisegadamagigasu.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/46133760845.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/febogudepavoxupano.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/12323802792.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/679o1psft77j0opnlvt21cgtf9vapkeb/70449601539.pdfIn PDF document text
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/80441239901.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_off0000be2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2A 19068 bytes
SHA-256: 5319886225879f06e64e66eb06bf1e667576a3f6bebae6a2c7e0394fd3612a04
font_01_sfnt_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 10464 bytes
SHA-256: 6ed42de1ef8b530a4317ab896e89b72e12643860a477bbea1b139ddf5a8e7b3f
font_02_sfnt_off0001078d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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