Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40e229b4df282bf…

MALICIOUS

PDF

85.8 KB Created: 2021-09-11 02:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2ffed6bba9272b6c35084badd24739a4 SHA-1: 31dd815b0c5e69c19ad60e967801ec4d6cc77a6a SHA-256: e40e229b4df282bf1ffdff4f0af9fd6d58028b483e3ddb55ba189b272d0bd329
164 Risk Score

Malware Insights

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

The PDF was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress uploads and other unknown domains, suggesting it's designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/baa7884edabf0a2bc30bc0d70ab8b093/tonamipivefesituran.pdf In PDF document text
    • http://shuimotongyuan.com/userfiles/file/76163852167.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/465947834.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210909_40E174DA6724761C.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/xusurax.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/pejilidiperoz.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/70972234155.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/butodugukarilodoxakasa.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/kiguv.pdfIn PDF document text
    • http://net-marketing.hu/images/files/9292904968.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613416d2f2414---jalurotukemur.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/64299004044.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/31917998960.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/surajafojadobinevolaz.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/xadetuvamuzixixesebiba.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/69230122531.pdfIn PDF document text
    • http://gist.adrianlechowicz.pl/userfiles/file/vedusanivezisalafa.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613508dd1f56a---kunuwureje.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25066538064.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/fusotetod.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/694025690.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/jexomotogagutezovatoxepa.pdfIn PDF document text
    • https://brukspec.pl/upload/file/zetolalebisaguvujib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=whatslive+mod+apk+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_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 19396 bytes
SHA-256: f28eba57f95c6edf5314168e8d67e29d0b6bd48509907a5517700d3c97eca8c8
font_01_sfnt_off00011874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11874 10796 bytes
SHA-256: eacece3a108fa687b8f58c47f00bee5a950cffa16a2a6ac5dd00b109c2eba7d8
font_02_sfnt_off00013132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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