Malicious PDF — malware analysis report

Static analysis result for SHA-256 47adcdc8b072fe28…

MALICIOUS

PDF

81.9 KB Created: 2021-08-23 12:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 009a381fb3f9c8a77c08d5cc76b579c7 SHA-1: 782e3881d87bdbf1f14c9579738e338ec32e706b SHA-256: 47adcdc8b072fe28ae39199300d23c90043f7c7ec49b44315c9ccacb568e0e85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicate a link farm designed to redirect users. This suggests the PDF's primary purpose is to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://philabc.ru/uplcv?utm_term=should+i+be+exempt+or+non+exempt PDF link annotation
    • https://408of53crownstreet.com/assets/media/files/napufiwoxobetuwik.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/jjfg715hdme2grft68br2upeu8/37239413719.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdb2d7400d---88683577015.pdfIn PDF document text
    • http://c-six.it/userfiles/files/6532703242.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609404779caea---41060948026.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/19758396007.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/zubebibagevevodefosugofox.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/08/02/35497871338.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/zuberokuvigusumusasuv.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/89215973581.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/39399486720.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/jgu4mglghsvm9pvel61qaqhnd0/15390804985.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/81512302314.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/gabimikivetegiw.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d437d17f4---79710425047.pdfIn PDF document text
    • https://sanidom.pl/img/file/vijawizofigefege.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/gewujobus.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/d76cda16efbe04eaf7acb9595ce0d3c3/84031768164.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/80832673977.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160986f6932bab---xowagupe.pdfIn PDF document text
    • 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_off0000dee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 16348 bytes
SHA-256: 49700978ae8905202114b07b6054000090a580a39c1fa49872a96efae1478ba5
font_02_sfnt_off00012121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 10744 bytes
SHA-256: 0e41e705b45c6b07aaca16e01be0022d9f90d5ad81b5c8e400486038469c5442

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