Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d47d3a7cd01efd…

MALICIOUS

PDF

97.4 KB Created: 2021-07-30 10:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 842ef138b6c78aa0f27e70beec5f00d7 SHA-1: 239892620a89f33e74f70f307f2cd33d20e868dc SHA-256: a0d47d3a7cd01efda4a091c4e0768b744b436ba13bee052cf5fb962a9b6e59e1
212 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to deliver a malicious payload. The presence of a 'password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading an encrypted file, likely containing malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ee6e6753f6b---bazolopipelipexesesufan.pdf In PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/6393295884.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ecd109ed96951e370cea0c0198128ce/27958354088.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52e2578ef---54644282490.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b9022a7adfa---21225314624.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/69132306840.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/38174318384.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4bf035ab8---begugowapepe.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/99335607558.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/b78db9ef39ba2d49e84a116f87b9a47c/sukiseguzefuxakin.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3ab1b144---negamez.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1ca71b32631af74bb007c2d1f5620479/1409067519.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/25/file/20210625_124905_107.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/gitowamibadolusepelizun.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/1805793029.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3e1629a837a2595cffafa3d1cc9443a4/wanogevove.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e3c6243a0---48793259789.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/13639436046.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097d9b6547c4---fuliminimosufisiga.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/28370795773.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/nekebil.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740861a8752---41177175956.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/78116983450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=building+codes+illustrated+pdf+free+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_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 11032 bytes
SHA-256: 9f05bd084ff648d1c01a4e82a9119a2409fcb35c4f0b1ddcbda362abab770ff2
font_01_sfnt_off000130aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AA 17748 bytes
SHA-256: dd2115aceb16c9d95337af7305ed1c3701560d93792eec9c2504941993333898
font_02_sfnt_off00015f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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