Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa786c82866fc5d…

MALICIOUS

PDF

136.6 KB Created: 2021-09-07 06:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bb198a8fa5577277e1de84c71a4d60df SHA-1: 2f7328352fa4ca6e48c44593b7eff2229320a762 SHA-256: eaa786c82866fc5d0ee2a5d602a9778fa13738707ef1ee423e864e4bf926fade
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely to obscure the final malicious destination. The document body is unreadable, but the heuristic findings strongly suggest a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://ecohort.com/userfiles/files/76731625889.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085afc95022d---gibexozojelif.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/17167487916.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5b82ac927d6c419f7ca550b73c7495a6/bevunad.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/91375998525.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/pafitolag.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f2c7f20da56---palokuzedukufixi.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/2797937268.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/076d0fa3981aac991349346f24f89a53/nomukifazaru.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/0a1da16f4eb79b72c6001d52d6d8b37b/85261944238.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/zetufupafibupe.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/8918620460.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/kibenebugorobo.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/031634367548.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096682ebdf71---kemeluxitoputezogodet.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/direretekavixuka.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/86b315fe86457a69fa74bed22018e77a/fuwoxi.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/lador.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926262bace7---29746344796.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161000fffd2a22---pubuk.pdfIn PDF document text
    • http://ndt-ultratech.com/files/figona.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf2bb08736---31818200023.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/wepekajufomugufas.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/19338238335.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-15/20210715144707821874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=alcatel+2008g+manual+de+instruccionesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB6A 20268 bytes
SHA-256: d7e563e193f490b4bcc5c123a9674f50f7e77cd87f29d53f799bc7b6b8d7e6bd
font_01_sfnt_off0001e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E022 11244 bytes
SHA-256: 4b62f2d449211bfb3e7ea1e45c2a2852d166a309394c956cb994e1e80adcf249
font_02_sfnt_off0001fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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