Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3a2432fbfa765c…

MALICIOUS

PDF

78.7 KB Created: 2021-09-17 08:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3b27f38928715b8716c1b78771cfc995 SHA-1: 34393b23ae8c99cea284c72b7023d47932ec9223 SHA-256: eb3a2432fbfa765c141133f77336a756fe95148fa4888c5145bed2b2a61f9284
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The primary function appears to be distributing links for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hotspot-usa.com/js/upload/files/19977133972.pdf In PDF document text
    • https://adikkeempat.com/contents/files/68254012298.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ecb6c9917---44208066438.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/17827048024.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/muminilajepasoni.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be44f44040---fajovete.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/66280cc8d6ead3abb0b916653ad0c88e/pibavopabozinekitemet.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/taseremonariledejuz.pdfIn PDF document text
    • http://orem.mn/uploads/files/6448981801.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cd2a848bc---16432581426.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/3874593611.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/30725894303.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/319df68887b3f7381ad5cc0996cff5fd/wuxaxevubobafipizow.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/jobisewixepefisofixewa.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/9114581922.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/tabatirirorosujadapanojom.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/66846654294.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb145a7943---68083883816.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/9339201831.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/9958218977.pdfIn PDF document text
    • http://metallpress.ru/files/gobewavelubebasip.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/79501846084.pdfIn PDF document text
    • https://songhongresort.com/img/files/dibofelapuloteli.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/mupararimazawek.pdfIn PDF document text
    • http://www.bandungmesin.com/file/xiwufubesalibem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gardenscapes+unlimited+stars+and+coins+iosPDF 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_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 18456 bytes
SHA-256: f9cbf3f013131f332abe51cb72b9957d4a22076c9e7189084a373127418f9880
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 10812 bytes
SHA-256: 3679d51989540470b6c99b8dd848de062fb2442504cfd6df598a2518e95612d2
font_02_sfnt_off000114e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1