Malicious PDF — malware analysis report

Static analysis result for SHA-256 565cb454a888cb25…

MALICIOUS

PDF

75.1 KB Created: 2021-09-04 20:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ca52d6907efb93690b20cc186f2c14a5 SHA-1: 0695b821d3bd4ee06d4287ef4fdf52d94150bea7 SHA-256: 565cb454a888cb25c4422206b1b287b6057266e0fe545277b726b9054adac0b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm directing to multiple websites, some of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and link farms indicates a potential for exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bevillelecomte.ovh/ckfinder/userfiles/files/kunodadixokave.pdf In PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/8308693857a7ef435033a5a0b43d47c8/losozuliluguxawanefit.pdfIn PDF document text
    • https://magnificenttreks.com/userfiles/file/46293272355.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609af90e136ec---62162851476.pdfIn PDF document text
    • http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/82733159185.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/83555793036.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f75f040fc344174ff51d178cb903febc/21127725204.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bca2c4a3c---pilejapoxilofigomit.pdfIn PDF document text
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/motibofamapepojepafatix.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/21823322798.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807d02b1fba---31166721687.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/97886392938.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210617_175833.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0ca2b8ed---kifotexogidelomebulesameb.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/45133246851.pdfIn PDF document text
    • http://julianina.de/upload/file/46340649632.pdfIn PDF document text
    • http://humanlitech.com/files/files/34504214298.pdfIn PDF document text
    • http://timebymtm.com/upload/files/41906099815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=study+guide+for+1z0-061+oracle+database+12c+sql+fundamentals+pdfPDF 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_off0000bb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB62 12096 bytes
SHA-256: 5ad4c02c6d46ba2f1235cbcc2de41df0647ead1396bfd98e38d05e56a3635671
font_01_sfnt_off0000d803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF015 17936 bytes
SHA-256: b68f7ca00d31c68b23de2b7109e5239286a9167c794088eb4113446f1487fa64