Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b69d04eab880a40…

MALICIOUS

PDF

76.0 KB Created: 2021-09-16 04:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 48710c3425f8f6851587397f7d3d8187 SHA-1: 9498775f24d585d1153822cdcf0cb9a12a519c44 SHA-256: 9b69d04eab880a40390c45c4c88340e696782bc9ecc1301e6290e26c11c654fe
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URI heuristics are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=present+tenses+pdf PDF link annotation
    • http://t-p-fortune.com/userfiles/file/117162178.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/nokujomoka.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135b52a99d38---63154996507.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210901_67DFB9AAA6FCA453.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/totibetomebuvixuzug.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/lasidufaveja.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/13069204974.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/4838d5d6e4de60ad1808e26c1e34b44e/dawebagajizasu.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/72499671208.pdfIn PDF document text
    • http://apvn.info/userfiles/file/5896247611.pdfIn PDF document text
    • http://vikohasanfiber.com/upload/files/vulibepawewurax.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/3961891954.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/linomelolukakudipuzon.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/11896533507.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/loritunifupexip.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/7749070883.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/7ed13e4c8d4f07b6a2fb3a2015136b4f/pamepisopibakixiv.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/89651124172.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/sedixipagaw.pdfIn PDF document text
    • http://warehousetraining.ie/images/44840908087.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/vogasinoxonisisi.pdfIn PDF document text
    • http://zatacorp.com/upload/files/vuzowe.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/64877313522.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/6303002870.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/susironevopiv.pdfPDF link annotation
    • https://accesoriosalmayor.com/images/userfiles/file/fazadunokerolebosufirufim.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_off0000c6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E6 17392 bytes
SHA-256: 7a1b1df33a814bd1791c43e204c4a254f696522826214789ea96cde93d2a0658
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 10072 bytes
SHA-256: e496bc09a324c0badb963d3d2f4591178e9c5ebe6fcce588b070c7c72a22997b