Malicious PDF — malware analysis report

Static analysis result for SHA-256 e462951266b524bf…

MALICIOUS

PDF

83.1 KB Created: 2021-07-05 13:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1132bc048343db82a78f2cebbf9c5be1 SHA-1: a76d018c10ca5f562db9d0c4f590b8a211b0a0eb SHA-256: e462951266b524bf4adcc53f944ef4eea60e2ce935f554adb318f7263c65dc01
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or phishing pages. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using disposable or compromised hosting for distributing malicious links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd48816fe1---xidoteluva.pdf In PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c7c3c450---77724216643.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/f90ab8dd5f3ce1d9a83d1e91884d810b/tilikalemugil.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6dc98c934.pdfIn PDF document text
    • http://calliopegoodrich.com/clients/73417/File/42158501417.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/53995013028.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8eea675398---44194561847.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/zexirowivapoxomasez.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/941a5ee80e179d263c1b057980269aa3/nivopiwikifuritaxodozi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jm72rb3l18j05ol6fqf8qmng56/13501060121.pdfIn PDF document text
    • http://apvn.info/userfiles/file/1778324420.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/vojarifuwotigetikeb.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/rebebarakifajo.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6dbdb56e---nifonisejonamuzobonew.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/a0cstcv4111ltjuvvn6ali4qvk/wararojagegoxarezometu.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/80619353440.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609d691534504---repoxabaluxibezuku.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/pexizifepobas.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/romuzola.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/dcd002a876a96628e27fc3b6fdd8f891/63108227014.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/683264112b6fe1d0f36847d1453cd01f/wukedasorokufomez.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/52635453830.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a847701111e---8709530469.pdfIn PDF document text
    • http://aven.su/userfiles/file/bivuxafikatumodubo.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/jefosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=largest+automakers+in+the+world+by+market+capPDF 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_off0000dde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE2 11448 bytes
SHA-256: 7efe83eca3012854cb4da691baad347df5480be244436af231e33ebb4452b373
font_01_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 17492 bytes
SHA-256: de73eb40d73a3a504f14ecc8373a4881515026f2438c529454bc6fadbec5af54
font_02_sfnt_off00012671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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