Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0dd0565515d275…

MALICIOUS

PDF

91.5 KB Created: 2021-07-31 15:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f1d6c606e680f1939a9126afb70531ab SHA-1: 77d2d12468965bae8a13c6304cae3ef0842f8151 SHA-256: 2f0dd0565515d2750e4f3a34e6eaece669943870e437dfcec9f4ac823c77831f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=yiruma+kiss+the+rain+piano+sheet+easy PDF link annotation
    • http://paillasse.hu/userfiles/file/majoz.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/mokerijimuforoperosig.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a0469a1fb---bafaribazozobelunekase.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/25091725371.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/18400380981.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/78871795518.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/22607136327.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5404694e547844b15ad10626c7817a97/muzirebax.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/nodafuraloz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c15ce7e263---rivilesuzafavuz.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/29ad37f2d3439ebca69000f83b757b05/82504500517.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/3uoulmskhua0p3930dnjfe5q57/50175664375.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/lumotodofakonujofenanura.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/30ea6c52decf5dfd4e121bb77c21fd65/79380058328.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210625190644.pdfIn PDF document text
    • http://radfordhsclassof1970.com/clients/878146/File/vugofezisi.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kaxidaxexomazeki.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xuzad.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/71890630652.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/miforatelutewawom.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5a2338643---17982950186.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/gvne5bcik6n89b4vot0hj82ujr/kidekufuvudamesorobid.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
font_01_sfnt_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 17180 bytes
SHA-256: 095620c435e369bfdc29360fed65d9b1cfe5936399303f653210a8892644137a
font_02_sfnt_off00012c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14495 10760 bytes
SHA-256: 894eccf7defada604092c0e999583eb08cc9f79ee9e8399b6967baa35f8c7fb1

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