Malicious PDF — malware analysis report

Static analysis result for SHA-256 1200c26ee22d88b8…

MALICIOUS

PDF

81.4 KB Created: 2021-06-25 14:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14dfbb8e7535df3c6d4dcf32df4a486a SHA-1: f285e0c5bb4a581b478cadceaf6680baf86370ef SHA-256: 1200c26ee22d88b82f0ada296df9e7843ec8254930cc5c957990e95b74e30c2f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farm heuristics indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6102505e8---81979040526.pdf
    • http://thsport.dk/ckfinder/userfiles/files/jakekulojonazeke.pdf
    • http://ketnoikienthuc.com/upload/files/xebogilevegusazoxu.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/8bf47f2161159be918884c6d129cc1d0/38919566091.pdf
    • https://jamuiboe.com/webroot/upload_media/kidisebuzajun.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f2a1202de11ff5e175757ac721fb1267/xufobobezarom.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a976de9a6---63749678022.pdf
    • http://anhbanglaw.com/userfiles/file/gojipi.pdf
    • http://osc-pribor.ru/products_pictures/file/gawuw.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4tk95o63tvejrknjb7f66hjurn/39301255733.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/aced58e49b52ea8f6402e945fa9debbd/xawozug.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160891594685d3---tomajebaliref.pdf
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/lezewobirimaje.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1ikubhbkbam8g797lsq2m9uho4/65058721342.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=non+invasive+follicular+neoplasm+with+papillary+features
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d981.bin
628e60fef91cef707983ee10dd515026a12b93ab13b1cd9d3dc2f5a106c33939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 17460 bytes
font_01_sfnt_off0001066a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16792 bytes
font_02_sfnt_off00011e81.bin
297b608737e2e325d7e7c4d672ce4bdf8f5083d97efc568b8736fcca7011ba8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 11088 bytes

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