Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea7935db396e9b9…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 03:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 373c80c9ca816d7d1481fc8f3459959d SHA-1: 417421883b8f635a7d27a1462f0f5be24f8af24c SHA-256: 7ea7935db396e9b9baad4a7883c6307437df1d7d2e7a02a232760a53d8523f8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files or redirect users to phishing pages. The presence of external URIs and a link farm on disposable hosting suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://gagutp.com/sa_upload/userfiles/file/20210624232850.pdf In PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/hivva1tv29t2q78qsm97q06gej/12336444371.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ea6428b982678881bcd24f98d41e154f/58101936300.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/o63cipaepokn1a6f21i4rp4of0/wajowarizosafegumotabur.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/luvupaniwarerozusadit.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2c0221877a4c8a830c4ce3698a51ffa6/86538498964.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/rb64g5766bbknrvvrb4d9erb6j/91734854692.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/6778961047.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/8n6q9ec5n9gc63ekc4e7r0uu2i/nosidenokowokoji.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b1a2a5398---93943901577.pdfIn PDF document text
    • http://vititanon.com/user_img/files/nuzag.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a60c78b88---butakegugo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b587e13e4d---18582335050.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba1816816f---ruwuxaz.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/62585152590.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b111a412f03---94981970237.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/84389644497.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/vefozuzuxiwofukulurajofo.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/zewawi.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/zevijixefuk.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/turolizafaxuzugidijib.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85b77ea958---fowaxiluvagabagozevumobon.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ad921a36---lejumumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=nitro+pdf+to+ppt+converter+free+downloadPDF 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_off0000cb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE361 10572 bytes
SHA-256: 8a37fe43266fa72f7170be75920f594caf7252dfbfe981fda6cd769493156ec3
font_02_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 18424 bytes
SHA-256: 7b1c93911dbb4d76d786a70bf41cb50197d6aa6be4b440cb0535cc9a743e291e