Malicious PDF — malware analysis report

Static analysis result for SHA-256 93029e2e0cea75dc…

MALICIOUS

PDF

86.5 KB Created: 2021-09-04 07:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9b80b7df54aa2afbb03a18bd152c58bc SHA-1: 4426b9a5142ae870884dc9b95a66b39cf973eb59 SHA-256: 93029e2e0cea75dca4d6ed89206663fddc143f902725ee57ec161c6a533d77db
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories and other domains, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers flagged this file as malicious, supporting the assessment of a phishing or trojan payload delivery. The presence of multiple external URIs and compromised CMS upload links suggests an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mliqra3vroq36h4jp1m2vco69u/xigopisamugokanefovo.pdf In PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/xapitevinomugorerirenobu.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/97695936140.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/71288631805.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4a52c267df72d5bd03d306214a28b0e9/vikedametiselitavupotuv.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/30221294071.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/d667db821be7a5349b5186b4b00cff85/nawapuxetub.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/75389889530.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/68247074202.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/96401981411.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900c103517a---82412876461.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/11948857677.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/57170193295.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/vanejorizuwuv.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087faa38365e---67665267062.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210513085857759.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/39e80ae17285b529f8669ca0ffc868e1/34804195292.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/99811115116.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/10492366739.pdfIn PDF document text
    • https://softway.gr/ckfinder/userfiles/files/sigibigoluz.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/810bf6b082b1170c9e3378e56c18bc26/kojipubegusazovifoj.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/23540249575.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/16676994785.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/h4gp2i6et3qs12boou4n844f79/fafarugepomumena.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/a10734f15cbca3af98cb0a4137c0aaee/79604028675.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa5e5ea8be---goruwexolizigebiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ielts+vocabulary+builder+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_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 17716 bytes
SHA-256: 798241908d4a6ba926ddaec38bcb3a6e1178f0786fa612ad32441a21beb7bb5d
font_01_sfnt_off00011ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F9 10880 bytes
SHA-256: 04dbc63600240494ff1be41992203610a1f2457f257f60cf42c33a9ada5e6642

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