Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6e4bca2afefe4e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-05 08:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 078483841449cc864b4cacb6cf1cfeef SHA-1: 517f0014d13a79b2288701642ed895b263043f1e SHA-256: 2e6e4bca2afefe4e535ba4b0c7eb4cbaaf58624dab2c9eb20ad8e50c5eba27de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://x04ydivan.ru/userfiles/file/kibejafemegun.pdf In PDF document text
    • http://donateagift.eu/userfiles/file/lidokusoriz.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/jatapanaravigador.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/74949000231.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/60970111845.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b67b542f5---54106032993.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31303e58d---boviwefakap.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/20208256755.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/91c480d3e32cb7a7c55dd33fff491065/ponipu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b774fefd7cf300878e17c2069f3e449e/23439115722.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210805_C722C5E5A731DED7.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/80426248788.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/69647711657.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/51881317168.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b9256fb4832e7ef6b9f2110a117ec53/22064729921.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/kogukago.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ade63a6b5fc---fareluzavekabezowilemu.pdfIn PDF document text
    • https://webmenuplus.com/images/file/vujotajatol.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf4e307d76---82394864349.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091cfdae4683---susarivirodosiwogodu.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/hmsttnf3p5m7gslvhia9n8bu97/zovizejonu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161297ba5ccb21---4903778441.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/52255284224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=csir+ugc+net+syllabus+pdfPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/nuwugasazewixemezofasavoj.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_off0000e0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 18156 bytes
SHA-256: 42d8e4872cafb740bc84b8a759cddfc494098238a3d1252ca04a4b52d55f1e86
font_01_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 11060 bytes
SHA-256: c2caf97481a775de3b75b8dadd5acb22c722dcb7254fc8d65ed6605725396732
font_02_sfnt_off00012970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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