Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04329ef0741a326…

MALICIOUS

PDF

98.5 KB Created: 2021-08-07 09:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d152f414b013b650c4d281a7368c0d1 SHA-1: 7fb7359693bde1ca4d2d8ef9e3830d1795a1c015 SHA-256: e04329ef0741a326019184aa88c4ebea0b23275cf8cf9954523fcf2e1fa05775
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to malicious or phishing sites, leveraging compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://boxerdapolenta.com/cmsimple/images/file/nobimetixoruwera.pdf In PDF document text
    • http://dorapeyzaj.com/userfiles/file/lavabafu.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/jg29llukfnuhntmcqkj296tege/tosetorobotawulotemigir.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc67b788e---fibowavadajezuzubad.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb4b22e229---10669289517.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/iun9qpqgso1ulolfhmsp482pk4/ronikafovoxifewutitis.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/tipitajifexigowefufoped.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/f925d6a945859f9557d21b9014576061/9506090027.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/dagozubebaravijofebavi.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/xividalujidusukola.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/264e85d9c241e6bc1c3d6bca09b9226b/dibasude.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/fibibol.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/nekozonetar.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a095626c70---68881220571.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/xufuliwoxelev.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc32d2045---zoxirajalugenepukuwe.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/bijemurejidulowagusegid.pdfIn PDF document text
    • https://rjpexport.com/files/45279732285.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098af7968ecf---86337519381.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/64902569893.pdfIn PDF document text
    • http://meta-min.com/files/memiwewemutapewixurawut.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/93536078409.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/duloleludiraves.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b728d05f9be---jarajodixamizatovodikir.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210717_8481913DA231AA8A.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/7198156386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+use+the+l%27ange+curling+wandPDF 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_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 19044 bytes
SHA-256: 09cbfe89280778dc9200f95d4168f622952632ea850b2e7c476f07172524203a
font_02_sfnt_off00016337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16337 10860 bytes
SHA-256: 310c8f44b60967b3266bcf52cf43f330aef0812f0dc4ba2e8038975ee0301de1

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