Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4f4b771902f5a5…

MALICIOUS

PDF

77.2 KB Created: 2021-09-03 14:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7c0d1641d669cb94aec71e8284604320 SHA-1: 14fb86e834a2f9c22890fb1bc1ed55697ca35943 SHA-256: fa4f4b771902f5a5f47e39f57a4cef9f312636c61948048c543c252eb144ecc5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The document functions as a link farm, directing users to multiple compromised websites hosting other malicious PDF files, suggesting a multi-stage attack. The presence of numerous external URIs and link farms points towards an attempt to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aff1fa2c3c2---dapolajoga.pdf In PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/29247931252.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/d6b5f7de9a54beabeb9656d4c8150c66/88796708050.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/54982096117.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0260f3bfbc781c9f2920e3ad8d815d53/vuzaro.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/2307ec939820eef13b49702a85a772af/5305319429.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202108191348031864.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ec3bd6602---67510011865.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16098503b00367---78920649398.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850ab733d7e---xezajomowukamax.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/19037802296.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/db65c382b23448fe685cb3c614fe3ac0/madovagonogosu.pdfIn PDF document text
    • http://doer-sh.com/Uploadfiles/files/suzedojuvivol.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/bb828f447f5a15c694fe93158606de4d/vuvufoje.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5b8f162286060d5f28bfeef22d2633ed/sozezefosagaxalasuvu.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/24984163691.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/59435182653.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/gigivunukipumisamex.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/86729746459.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/moxujowipofopijij.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/16f66eb78750a649e62ab97e316d0796/6915940747.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/42411821002.pdfIn PDF document text
    • http://kalikraft.com/images/file/49713110970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=physics+of+atoms+and+molecules+solution+manual+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_off0000c635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC635 11000 bytes
SHA-256: b4c46cd6fef2aeed87447228cb924dbb68d78365f4f5987598ff5ea896e467a3
font_01_sfnt_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 17944 bytes
SHA-256: e5b628489c0390b7196d8fcd21b13a38e38fc45465a313f3b0c8e4d98c940e16
font_02_sfnt_off00010e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.