Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45060295258e406…

MALICIOUS

PDF

91.2 KB Created: 2021-09-04 01:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9fbd71dede2a585eb9b6bf2b40654593 SHA-1: 76b8e75b8f586aca26ba8995f16c909884f4b487 SHA-256: d45060295258e40617e298a156ea2e03311c51b7e1818bd04314900df6d8ac04
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other disposable hosting sites. These sites likely serve as a distribution point for further malicious payloads, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb480e1d89c---82906208223.pdf In PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/najodemibomasukonod.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a10e458abf4---74192579563.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/sg7gu4rjis9b0unv0nu36gpftp/49767686085.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160920e4321d48---63597756881.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051820013547.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/tt8s1ulmjnlkk12l4mokvu86k2/botolenafeke.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/60168331562.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/15823653079.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/gazisovezepobokov.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/wasaxib.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1488e9ab02---mujuzegumurugisosagisip.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ed88944a656eba0ba679b8c989b47cf6/gududupamajubemog.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/92815385816.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/janatamejojasarifezu.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/28776675924.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/91020627086.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b66421699af---68417747304.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff7d229b7---bovefosiwe.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/kamuvuzita.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0379b66fd3---rugexiwugebadijar.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/36249563903.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/zolakipiwinixewu.pdfIn PDF document text
    • http://geotersrl.it/file/42394647339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=vagabonding+book+pdf+freePDF 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_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 18640 bytes
SHA-256: dc1c3f428ce471e71644566b51ecc2b9fadbf6b8a998bf773d08274a9ccc674c
font_01_sfnt_off00012f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001477c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477C 10560 bytes
SHA-256: dcfbafa95967dc21dfc3d3395b3d7242597c0e66d9e8f1b05a1f625cf262b842

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