Malicious PDF — malware analysis report

Static analysis result for SHA-256 696e1d43d8edd3d8…

MALICIOUS

PDF

69.0 KB Created: 2021-09-07 11:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3a4b672a2da09bebfca531b33c75bb60 SHA-1: 69d55cf3712189b2feaa16b123ac80248251dde6 SHA-256: 696e1d43d8edd3d8245230398f038a1521641f317b4ee14575c3a72e1a45a4ce
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting a phishing or malware distribution campaign. The file's structure and the presence of external links indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crysiq.ru/uplcv?utm_term=vice+city+cheat+code+pdf PDF link annotation
    • http://hichipper.com/hichipper/uploadfile/file/2021080213511973499.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/85529305985.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/19781777934.pdfIn PDF document text
    • http://berbun.com/user_img/file/85846359385.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/84279730857.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/18256321688.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/77136795714.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/2nvm2njnn7d85hnbp7e52o6q8e/30322538450.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/xujanusa.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/e1b20d13311767d93e6e04bdd09b25df/nupimuzisejinuzokokaxifi.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/95865831821.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/23cd09b0c39808d1b83664754468df10/fenuv.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce36784de1---30121644954.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16097ff6d5d0f4---39490315706.pdfIn PDF document text
    • http://wwsm-us.com/files/file/33770085661.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075b823d6329---85788176299.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607760c7022e2---65914124989.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/38530953180.pdfIn PDF document text
    • http://888chji.com/userfiles/files/pivixisozalejuzuver.pdfIn PDF document text
    • https://noventa.cz/media/files/file/61743989176.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/b7184ebflqvqr8f33487calue7/33986504422.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_off0000b1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B3 14748 bytes
SHA-256: 8c3bba7d1fda7d641e90ee8094c8e1dd441e864146c22ceeccc29632ac5639b2
font_01_sfnt_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 10384 bytes
SHA-256: c3a37007f37a2d8148a03bc1ec61b3b8ed546f37a674d98441fbf2b1167c078d
font_02_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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