Malicious PDF — malware analysis report

Static analysis result for SHA-256 88245fd2f60ef0d6…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 04:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 919ca0b667641405e9630ae167c8fc9c SHA-1: 94cba3d70f3d2ffb72ae1d7cb74497b7db325d3a SHA-256: 88245fd2f60ef0d689ac3aa8da7dba1cedb725e83ec0d56f328a97fb91296794
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The presence of numerous URLs, many pointing to compromised CMS uploads and disposable hosting, suggests a link farm designed for SEO manipulation or to distribute further payloads. The document body is heavily obfuscated and appears to be non-readable content, further supporting a malicious intent rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://castel.ro/userfiles/file/18605875081.pdf In PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a26c6860b64---73202759049.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/94818030771.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/6c45c1b78f9cf84411c891f94f757833/tajem.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b935d51059f---mewibudab.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/48628910622.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/93017239798.pdfIn PDF document text
    • http://thongthien.vn/upload/files/gufur.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/juxada.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/11522091624.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/tenijaderaj.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/34edccbb6b20d617fdc34b7445412a02/8698172591.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/61646811562.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/oc5aa1pa4goksgtfmoenbm3602/7135088485.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/mazexanaxabapa.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/remaboturapudipuziniloju.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/woladaneli.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/639afee2c87c4ecec0833178d5e87e52/kovezasog.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086d381baa4a---90616950684.pdfIn PDF document text
    • https://rintrans.com/files/28166568702.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/78234595516.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16125883058993---69304114698.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/20641327343.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/dosavalovow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=lalitha+sahasranama+stotram+malayalam+pdf+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_off0000b5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E3 17304 bytes
SHA-256: 2dbdc0c93c3f9fb7b9e000aa6165d2f763128e6987946a8f0d5b0a887dd4c929
font_01_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 10788 bytes
SHA-256: 658ca9e50a12a6c57545ba875f767602545c9796afa8d2e45248963f659acf36

Open this report in the interactive analyzer, or submit your own file for analysis.