Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddd22d0fcb530f4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 22:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 79f2dc7022e6c9360ec597085277b880 SHA-1: 5e33a91c6c0d6ad599fa8cca13e1ec66882c8c41 SHA-256: 1ddd22d0fcb530f4d6bb6c72d04d96cdf00b7c187f92c64b5e1a3a1ce441d2d0
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://stoneappeal.in/FCKeditor/file/resavijisafiputofoliwut.pdf In PDF document text
    • http://cafegreenwichvillage.com/uploads/files/75235950600.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/91246982642.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1bf29c7c5eda1a0a6e2649b5cce52df4/5278322997.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/29982311571.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/2188879467.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161339f374d4c6---62170513260.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/mijomomovuwitulubuje.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/mowilupizonu.pdfIn PDF document text
    • https://penal-garazh.ru/files/tikevewageto.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/68555931537.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/bupajefebanujawo.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/budenijafotaj.pdfIn PDF document text
    • http://meta-min.com/files/petiberumufopaxozaxekope.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/pesoposukoka.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161401fc8b07dd---60519174159.pdfIn PDF document text
    • https://777mto.org/contents/files/waromuvejonet.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/zimavuvugozejekugi.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/69116797626.pdfIn PDF document text
    • http://metapolar.hu/tmp/suzavimowawepideji.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/14118197851.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/lafapowomutasowil.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/42568445933.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/putorevafaso.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/jadelewelefikeguje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tty+mode+android+meaningPDF 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_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 18120 bytes
SHA-256: 99dabd43b156f3150bff9964b239189e18996a259a2f35a4f29b29f5709cf2e5
font_01_sfnt_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA9 10456 bytes
SHA-256: 7e8b71f3e8dd76005aae12810012e9f79ff46c5ccd04b7cbd72767f73fdf8580

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