Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd75de3dbda9100…

MALICIOUS

PDF

93.3 KB Created: 2021-07-08 13:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 68d491b0d5d25f7276ce6e21edfea128 SHA-1: f4dffe6a2db8871e3388479df7d6111289a35de3 SHA-256: 7bd75de3dbda910041df90d6b8e5024e5afc7e0cd0af1b941e4e2af8aaf81510
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://philabc.ru/uplcv?utm_term=fries+with+old+bay+seasoning PDF link annotation
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/d7cdce1ef6d246e17ec03fabb2905f98/67629435119.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/kabajiponumafixorulaj.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/zolejomapovolubir.pdfIn PDF document text
    • https://ahha.az/userfiles/file/12307208380.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/30c5d6327b8bde3307221dbc54ca10b7/gifawaf.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077462b567e0---93734792091.pdfIn PDF document text
    • http://asfalon.com/__files/file/tafarovejuzivufemamowupo.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/6f381d5e3bb1c203d8ad52a1e3240175/sufenajitugevafo.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/77b62c1b6aec02c823664745999bcaa1/bezuvoparogeredagapajofa.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/98280741213.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/1703003188.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/kevarezovabibojefisa.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e005f6858c---bivelofadebexifimi.pdfIn PDF document text
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/64049804347.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/najokutirulutikajasodowo.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/risaj.pdfIn PDF document text
    • http://mega.kz/media/upload/files/22823327902.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb284db735---senuwiteda.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/57636836525.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a357eac2473---59674535925.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/77m9bfbs0vlrlh6vvdiuclecn3/manojaxeri.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a6696ebc7f7c09bc9bf64ee4d2f4a5ca/kusel.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840780deee9---31725624697.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929be50041e---nojukiseroruvamef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off000102ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 19336 bytes
SHA-256: 9f1e1e9ca6b2c9dcd6593017702b906cbeaf8d74ffe34e96f5f5d63d8dc0437d
font_02_sfnt_off0001350d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350D 10844 bytes
SHA-256: 18960a274ffdda41846fb0924fbdd68ddd52a5a40d8ee354783708a3d61d2f7c
font_03_sfnt_off00014dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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