Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15c108a57480f80…

MALICIOUS

PDF

68.7 KB Created: 2021-09-29 06:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8af0b22fcf1e1af29f353a3d9942b85a SHA-1: c936504e897d432c4447492619d3d9e537da429a SHA-256: d15c108a57480f80b85c8c3339765d6ff966796a64107ee20aad33960d05b213
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and a link farm pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8a24c455a76cf762a98f7e2e40334f6a/xagapirulinegizami.pdf In PDF document text
    • https://nyig.com/files/file/70208186213.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/gilokubazariza.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/62525455858.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0075e2406---77359795557.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/fumemomawimaberudufileso.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/78818952879.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/92917765494.pdfIn PDF document text
    • http://crm333.com/documentos/file/lijinalebotijuwoz.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021092217253173499.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/juderepurusolilazemome.pdfIn PDF document text
    • http://101balkon.ru/upload/files/28388113388.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/77159318306.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109221555304818.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210920094624.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/58424918947.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/33385789952.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/fokafoxelirif.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613af5aee2786---tuvupatokad.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/69060935487.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613459cc6b280---39964949058.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/27026575840.pdfIn PDF document text
    • http://labradory.pl/file/72327224475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=net+framework+windows+8.1PDF 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_off0000ad9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD9A 10948 bytes
SHA-256: 01709e6e38025b0e602058a3a8a37a773141fef8bd5f9bc7c92e5ddb96cb336d
font_01_sfnt_off0000c71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 15288 bytes
SHA-256: d1fe2567006f32740617d95ef0eae1a45505ada0cdb0a5cd4c74bdfe5699ca79
font_02_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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