Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e51c2fd0db28c5…

MALICIOUS

PDF

94.7 KB Created: 2021-09-05 20:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49a66b335ed7f87eb551f93ec42e7624 SHA-1: 8f5c3ed0fd2bad70fa8bc1544a3804775575a5e8 SHA-256: 40e51c2fd0db28c5e6218dc9b7cee83de7113b88b1efc48d716d6a39cb47d324
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload directories or disposable domains. The primary goal appears to be directing users to potentially harmful content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://dogalakustik.com/depo/sayfaresim/file/wirusanuruw.pdf In PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/76584292145.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/lomoresuvogixobiloduribu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe1f4bc1a2---newefedebagelinobopemo.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/gubijumetu.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/lonikusede.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/gitus.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42971af4b---37742062008.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085beaea8a86---12619581794.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/sejidu.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/2760905866.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/33655420953.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/21879703120.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/refinesabezixisobo.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/a8d1ea0965f7712a509ba9b3e4740239/divowinotojalosemosavig.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/tasun.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/50542642957.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/76797162182.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/dorapa.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/vapudetetesefosolanenoj.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27b3c5f40---kobulu.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/seketufisifeparamuzidos.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609247deddc84---sidekilavelevena.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a3e50042dc43cbff1cec7c7af48ffc6b/97243289016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=vaticano+ii+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_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 10136 bytes
SHA-256: 43d2749c9c6d0e88d8c99f2d1d0b0e4e6f03b79a9e30fc0323dd73353192b984
font_01_sfnt_off000117f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F0 24432 bytes
SHA-256: fa81393c5495c7f79e280e04894444ef0fed69f1c3e7ecb443dcc73b913de10b
font_02_sfnt_off00015542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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