Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced25508bc16baf9…

MALICIOUS

PDF

94.2 KB Created: 2021-07-31 20:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: efa2769f22fc3b46fb2b5274b2b47801 SHA-1: a0008ec2bdec8cb8c6eedf493cc4f3bde97d5484 SHA-256: ced25508bc16baf9380e8913af84b0aecbd2c5271a194c33b9fd887978f5b6bb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites, including WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves directing users to these compromised sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/474e87a495b612ec2a4b1d213108fae2/lenedupofizun.pdf In PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/45086262406.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6b18f096---60241316327.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/mojuzef.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/79305116221.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607745da67d17---52911989929.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/nezobo.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b0dfa1136---15575254381.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/fuwolujewuvaxanigakul.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/lopizelafumemovosuzokagit.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70b3d0075---lugetudokugevuwefu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c991a960721---66165279349.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/27744563622.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/9eb6uih8je5f88ggbrs1kd2801/zenikafefoduxeriwirar.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/bomutojirusabi.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/segopasekavaduguxunusexo.pdfIn PDF document text
    • https://bataretak.com/img/files/file/pisagukokaxazin.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e055928d4b---92036215499.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a072d203f36---jolusesalejumefegi.pdfIn PDF document text
    • https://samowar.ch/upload/file/tugelidasunukiborebup.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210609051520.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/27939971111.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609838f7517cf---79344219444.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/2ba9723e3e0a27ab0ba1eb861b6ece05/115003227.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/epjbq3b2lfg4gcqu6avse8fq9b/rameguxit.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/28318508178.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/fjjhdkuv5nta79ncfhh2pft9q1/19655760634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=unblocked+games+66+fancy+pants+2PDF 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_off000109a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BA 17412 bytes
SHA-256: a24d5ab2a28083361d7a5a8a8390a45284da19130961a560807eec4b6d5c6649
font_02_sfnt_off00014f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F30 11412 bytes
SHA-256: bce31b79866b950c9d6847cce4c23490ef8b4e115bc788b11555c6d4b1e743de

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