Malicious PDF — malware analysis report

Static analysis result for SHA-256 6289bfa8eca0665d…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 00:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c383dbda518ccca60a6aae3497e1f9b6 SHA-1: fc4378a6448fcb720c3e5dc8ee4bd08a0c594c2b SHA-256: 6289bfa8eca0665d64e0ac4c9ce3cd8f222f52ef84782de8cb18384f8aa0faba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection suggests an attempt to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/631u9dpjgol6qodm4amc0sp6ja/befexibuxitarevo.pdf In PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/8228071384.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/fupiraj.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/41122168779.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eda1611b3---xosan.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b55999e9354---fenowugosaworapupisa.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7c731a031---pimadiza.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf0edb8c7---zinuxikuz.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/mojexinegap.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2b3f9381c9ad1a8963d28f0d26a1718d/taravovulukimebej.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/9d393be6558b1018cb4805990f2f50ea/nigosomopupololafulex.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7bd9796f5---59530143419.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9165e2d2f---64559034390.pdfIn PDF document text
    • http://zamgph.com/uploads/file/280151556657.pdfIn PDF document text
    • http://alkanboya.com/files/file///medozikalewe.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/k50pq15r16gc3k7kt0aap4gvqv/vijiwenadovufeguxilezem.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/90aibcl2pomu4e0d970n6t4iu1/gigipelanexivufurufemagox.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202108140254400716.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/besikirosefuv.pdfIn PDF document text
    • http://hill-macktribe.com/clients/7/78/785e88641dcef8d5cadf71fa969cae92/File/12445284311.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/iomllv9e0p1jb3sgqi2i4u3mjt/2643416966.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/gapidejebamomoxuri.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/xekamukaxalusigegomuwow.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/nopolupezipuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=quality+control+and+quality+assurance+in+food+industry+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_off0000cefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 16268 bytes
SHA-256: 443e38d1e528dc7710139494d2791f2fbdbe69520904ff7646545f2f2cbff556
font_01_sfnt_off0000f87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 11032 bytes
SHA-256: 7520c119a00bda62097bbf25160fdceca822565fd0146ab9594bb0b54f3a2e9d

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