Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fb0bece3b47ac5…

MALICIOUS

PDF

87.2 KB Created: 2021-09-06 03:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d36db3eac3838c910f13314110b9f73b SHA-1: d832e45811e5d76157b714a8677e76121fbbc115 SHA-256: c6fb0bece3b47ac5b01a195202011bec1545c9af095c4e1dd5d0d9495e5cc098
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vankouwenenmastop.nl/UserFiles/file/75213150879.pdf In PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/45868666500.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210714_06C265F916201F8A.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6faebbb7c7---34804226589.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/74d608f5a57185d2361fc1afd669bddf/28973091633.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/bomosu.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/buvitat.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/90defb4c252b27c3479695c46e9edd20/25890116772.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f27a69c9c---43898210035.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/34199361083.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/83080574.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8ac9777a6---xonenib.pdfIn PDF document text
    • https://rajakedua.com/contents//files/65953125196.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/zesivozememidukokat.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/gevomexifilasugefuvexikur.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/68126098553.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/6941821502.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/loxalafaxujiratolopomeze.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/29/file/dewasigamegenonijogizu.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161257ab0be572---47900082674.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/78977103367.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/kumowevaxajopanilibo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4478b12715---89115124621.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dca62aa19---biguvowukesawiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=group+insurance+bluhm+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://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_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 17900 bytes
SHA-256: f5d15ce07eac325c335dc9926d4377e63f2d3687d9bb17bff908ccfd19dea541
font_01_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001356e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356E 11064 bytes
SHA-256: a24dfc963284bce7f8e9f82e45b0a724bf8d8eef329502d260638dcc2387f82a

Open this report in the interactive analyzer, or submit your own file for analysis.