Malicious PDF — malware analysis report

Static analysis result for SHA-256 362263eae5a1d1e7…

MALICIOUS

PDF

81.0 KB Created: 2021-09-14 00:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c353d82eecacffe570b9a863ad595fda SHA-1: 1c1f124843709fb99299aec59ff4aad9b1c2e0da SHA-256: 362263eae5a1d1e7c24202fbfdc08500bdd911c3ce4129c15a6ef3bd9e5b181b
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress upload storage and disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ooexperience.be/assets/Image/files/45569487391.pdf In PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300a4f58c9c---23111839323.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/4596055.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378b2ddd3b9---dotilikov.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/mivilegodoviwolekifuzu.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/79015563297.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/zupakoxitumapurimejodo.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/14623463156.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/milijuwilobikajepas.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/wimefad.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petuwofimek.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/5772771274.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/osrkef12g0lklh79vdpbq1p0mr/nivujanaxaliniluzilejubaz.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/63203134309.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/nitede.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/narofovufumagunerikuzix.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/nidepekojodezew.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/dexafidulikix.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c73935f16a---40023313622.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/19561953501.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/44187383902.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/56770546351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=epub+to+pdf+chipPDF 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_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 10228 bytes
SHA-256: 81338595b75f545c32d11ac59249ae54989494c286594b420d44a6767954581c
font_02_sfnt_off00010840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10840 17764 bytes
SHA-256: 9187682e3e581d9da613b9714d2d494fa945d1e69cb55357bb7d3ec78c8883f1

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