Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed8050652187fb2…

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 04:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b594e263dda5b58ad2e9cf5085434a30 SHA-1: 53387c7a8ba6b59d37e314203e4a85558645e292 SHA-256: 8ed8050652187fb21bc6e82c4cc31fcac45d9d3fa2c86f8bf3c17fa5702cf970
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URI heuristics indicates the file's intent to interact with external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://catamma.ru/uplcv?utm_term=carver+cm+1090+owners+manual PDF link annotation
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/lobajomupulavovekinij.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/2172825005.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b932616dc95---38115627047.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/82449799341.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/db195efacfc630acc8f23097ca2cab2d/wibafijixa.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/vuloraluwefigelujoxog.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160847a3902794---67316183246.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/kujizeraw.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/vu72vbldupg03ga8250ecqk53l/11973102442.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/kamemadurikunativegu.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6638b5ac6---daripakadigox.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/pifeluzenatozonev.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/rafomebunezapozidatoligu.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/97929103203.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/93663268352.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc8cdce37---foxudegibawinofetupukoz.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/bpcv5g6v721ief2k7e0qa8n86q/wobujogizowejinaza.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210621155827.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/72141055576.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/90395642819.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65458584592.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6fb5f2ef---ridip.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_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 10828 bytes
SHA-256: df3f0875e0ec9a2cf72c5a9d6b8414e6a84cfbfb3fb7883c9aa427e3c92c4a8b
font_01_sfnt_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 18364 bytes
SHA-256: 35ffd91d38fc51222d064845d3d12aa4f11ba3fc916e44b5983619bdafd5ae1b
font_02_sfnt_off00013943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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