Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ccd3d1e03a8988…

MALICIOUS

PDF

107.1 KB Created: 2021-06-22 09:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9612d2b4c42ac07acd0c51d5c01f2798 SHA-1: 376cc15fd304a4a39d4383d7243736fedd1efb9b SHA-256: 68ccd3d1e03a898860ce35f68e91f70e5802019ca3630697073ab28f0ba74553
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7ospe36pqt47kj0729tojnvuv5/muvikuxotonekoxupirulu.pdf In PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210619_B631031FC4D4F978.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/domadilix.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210601125502.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/59971706955.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec83380fc0---sajoten.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/0b94fb6080c386d6e1e3016507eacfab/konanemexasunakaruzol.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/76493313724.pdfIn PDF document text
    • http://altinay-law.com/images/file/12655138694.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097592cc4d26---zukuzigex.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c5fbd6bc0---2735727022.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add584b81d6---14510060173.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/q52f2essejlttqqu4ist89si51/kovinasusakivodatudiguk.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6112bc9f---40657997617.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609efd3f8c433---monujowifujikamamowiwu.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162215089820.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ponniyin+selvan+english+part+4+pdfPDF 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://scripts.sil.org/OFLIn 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
stream_005_off00014449.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14449 12448 bytes
SHA-256: 119c44154f76831f713ec193562ce2f6f6c84f0ba6ed93d00a8ee2e375096a90
font_00_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 5556 bytes
SHA-256: 0990f62f8cc7bd779c1cef85b66714fb34aa2299c2513946e17c8b9e6ce20c42
font_02_sfnt_off0001623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1623A 11120 bytes
SHA-256: 29a001078d2c3853a380d9a4812885082016ca2d66cecb95181953e0fda9bfac
font_03_sfnt_off0001886d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1886D 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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