Malicious PDF — malware analysis report

Static analysis result for SHA-256 469d4fdc02af3fb5…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 01:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0cc90703026c30dd2ff352647e9b356e SHA-1: acaea11169390d0e77b79caf68348488c5a8fd49 SHA-256: 469d4fdc02af3fb57154cf6a8398954b97e6f4f3343e5aa68dda5870c3ce6c0e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable or compromised domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=how+to+open+kml+file+in+qgis PDF link annotation
    • http://maidichike.com/upload/files/davirafipozex.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/39402296433.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/tutikiva.pdfIn PDF document text
    • http://riviera.az/userfiles/file/roronedewug.pdfIn PDF document text
    • http://stringladies.cz/userfiles/76397181739.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/64711557639.pdfIn PDF document text
    • https://agrando.cz/files/file/rigadeju.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/1732719602.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/41511494956.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/kupun.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/xuxofok.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/kunemuvubumevox.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/75745218537.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/12/4422306108.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614253d2f2a91---26163303318.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/79979164102.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/padebejozomobuwukezaje.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210905152422.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/peminajozuwuzubimidora.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/fefinenebosoganogilopedo.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/om0hnvj7u5v89ip95mno3p1366/bakuvufuran.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/q31mdo36p36am13am5elk0eak3/luzubikonunenewaxudofoziv.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aaef8f320---49701272623.pdfIn PDF document text
    • http://speckrepej.com/upload/file/durakuzupawukewim.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/dopiketuxenodomofupituvu.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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 10752 bytes
SHA-256: d32c977451d757b2777bab6c716f6780b4114d7f4a18ec54566869760e25ea09
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 17640 bytes
SHA-256: 5e3c9fafade3b00a004f907aaed7a53b0d86980d24a3bd720f569ddeabdabe04

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