Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0478c260241fee2…

MALICIOUS

PDF

90.0 KB Created: 2021-08-06 05:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 98946310de1971a237ba5209d5d22b16 SHA-1: 8b80a4283b30c921052b9e7535468a18656101d0 SHA-256: e0478c260241fee2799571f8e2045cd5dd424ca244e92d25ef1042a00f9dd844
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://urbancollab.com/userfiles/Proj_Name//files/17123660657.pdf In PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/41269812084.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/17839949081.pdfIn PDF document text
    • http://esteel.my/userfiles/file/logekibuzekagonomusi.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/vevevowe.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/41011673430.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/79570da6fa3622c8b262a79b4f56e2ad/zanilapapifesoxi.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/bemomadigepa.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/tofirinaba.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/koxuvoxolezimi.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/tovokexem.pdfIn PDF document text
    • https://menu2uplus.com/images/file/95009234671.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/77744040384.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/5743462647.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/rabex.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/66397839171.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/golipikivedanunes.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f93e41e3---74128828566.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/nawenimuk.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c34c140866d846cf9572fd1bad10fe56/femipaxodaxugufosus.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b55cebb75---kawojoguga.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/fb7235c61f596e982d5b918b9f731062/99463978465.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/67169926615.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/mesedegulugulevizatex.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/bfof3b05mcleauvur6gfef2sa0/32328072709.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab1da0893b---98248632092.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/13745449306.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160845cfeae693---75401697866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=birthday+wishes+for+my+husband+video+free+downloadPDF 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_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 11176 bytes
SHA-256: cbb835e68abcf70e632c872e6740aee9da6fa701f1b0ef1ab70d1132e01bfef9
font_02_sfnt_off00012b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 17020 bytes
SHA-256: 5099a4d4217fdb425af5a58a93696576eb2faabff5454b05eeb7047b2f6806f6

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