Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb12505b570a511…

MALICIOUS

PDF

75.6 KB Created: 2021-09-04 06:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d749cadcce10e743c484be40a02f35d2 SHA-1: e08b237922aff9d435c4925b548910f27f42ba17 SHA-256: 3eb12505b570a511b9e34242b98c3ac7c882b95d3e2187e4a51cccb9c806204b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the document functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://oniceh.ru/uplcv?utm_term=plantas+medicinales+de+la+sierra+peruana+pdf PDF link annotation
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608037371b549---79861121637.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16128483670f0f---piwavipe.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1066ce835---27906516314.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/78331793073.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/romanoxotasokafalidin.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/59712e75b3ca4b9fcd2c4fb4b6a64a74/wemozukobosovijosow.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/98112645361.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/14953131987.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983ff56818d---judovadusifatevuxizut.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/bajotodokefuvinobowuwemuf.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/3880090879.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/03s9thlfus60hjjiu6n8f6rjha/78870559338.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/bigamagelamavurogitok.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af89d79aa99---ximupoliriserekuvilira.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a371b45a147---18019711641.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/35656186608.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc89994f74a---jelasavanalupapifego.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/39457877668.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89dbbb97b---takezugofesaxovabojus.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/dodulusapujiz.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/81233713960.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/momuluj.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/f728i9r8tok3muj55m2khtiol3/togokar.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/tabogowarobolobadose.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceeae2221b---vanezepe.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ccea7d7f967ad9ef65edd5960511f6e3/65041628654.pdfIn PDF document text
    • 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_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 17740 bytes
SHA-256: 0ce41c12ec51bff6e82656a04b85b5ebe30cd428559b06f316427b1bc7708615
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 10760 bytes
SHA-256: 8cfcb19069c27f46fe77f3b0d56e9135a5a8e36eab97ad9ad5408b3240450552

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