Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba980478889ccf63…

MALICIOUS

PDF

77.6 KB Created: 2021-09-12 06:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a045a3840d658e5f3a14eaf7ddfd0b8 SHA-1: 330ddfc4552405f0c90e190951e11fbeb0d7057f SHA-256: ba980478889ccf63a5ac960e4425d6d441adc3e195fcf94d076f465f5b0b3863
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://flashdisplay.net/UploadFiles/FCKeditor/20210902195929.pdf In PDF document text
    • https://satellietgroep.nl/userfiles/files/24807478916.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210905_6D236072CDB24D88.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/83353066670.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/8303923610.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/54378675466.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/377c94b85ec8628691d29e9c669393aa/binibutudu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/46793697247.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/011651168185.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/71139339948.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/qpf55g4u061o3pb15ua36bqq75/nevofebebowob.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/45619994133.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/58264428905.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/3325586938.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e368cca5b---51181995746.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/wopamujusalelovazegebasug.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/mapas.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/xivojoxaratazij.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/44186905715.pdfIn PDF document text
    • http://metallpress.ru/files/91605164723.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/27463226587.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/73847941441.pdfIn PDF document text
    • https://kuepancong.com/contents/files/83976186742.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2847d212b0808e909aca3deb5a2057cc/fejatefumenef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=infinite+painter+mod+apk+downloadPDF 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_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 18076 bytes
SHA-256: afad2dc98a4184fd382ac21a665be57d65ded183d0725a9cd34f5f2e8f4fb43b
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 10620 bytes
SHA-256: 24e79303389d6f543513242b4d746d9384561b024c0978e6c9c6955e1872f085

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