Malicious PDF — malware analysis report

Static analysis result for SHA-256 27680371c3de4378…

MALICIOUS

PDF

86.3 KB Created: 2021-09-14 11:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 002102725550a81d89f9f4ddc8062130 SHA-1: 95be7c120340a61cc494ade56df180d6434bd346 SHA-256: 27680371c3de437883f03f466574d8e1cb2f91aa8f16e5e1ae229cce9be13b5e
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394e827a4dd---veduzuzapewupafik.pdf In PDF document text
    • https://sakura-bashi.com/uploads/files/202108311721552936.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/bifoxo.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/46821873576.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/lisekuridudoxulibepogaw.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/29328913862.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/83819890200.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/xuvufigipunedes.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/zoregezibevo.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137fe6297cb9---23999736103.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/39645787227.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161381e398b018---wajovelekizodisowemu.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/106f50f3898c3abc0be51367ab1a158a/99929557485.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/36550307875.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/tedelozusogusag.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/6246399291.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0e87150e0---921905102.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210910110241.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/kubinotazoranerufudibew.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/rejuzovapijivesatosub.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/robolegegipowolofakuzaf.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/pabuzebuk.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/katavenifeme.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0cf4a12a56f87ca746d0458b2afb3023/sarodurewarizogazebajija.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/73559321762.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/64857907355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=countries+with+largest+territoryPDF 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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 17860 bytes
SHA-256: 16cbeae928c26ad5476c93040a57095567631020d5b93de1636fd5cda06e921b
font_01_sfnt_off00011adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F6 10716 bytes
SHA-256: c4e984e169a20fb4edf926e3de491a4286cbe19824b6212cfe1a4cf239aa40fa

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