Malicious PDF — malware analysis report

Static analysis result for SHA-256 607bd6e61181b376…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 17:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 081873f25f1b71e1fd4bdfa624ab337d SHA-1: 190e8d78d4868daf77e08b1e5eff4c96b2db39ee SHA-256: 607bd6e61181b376fa3d4fec8316c7a045fcf5408a172ddb5c5156ececbe356f
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The file's structure and embedded links suggest it is part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/86404b492e3cfc0d68fe170783db1cd2/xovefejerorinaxolif.pdf In PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/4875a7d5268217baf02c83f4f95b345b/85655549031.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/49083487126.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/52981466850.pdfIn PDF document text
    • http://01host.ru/userfiles/files/xebunuji.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/94242716809.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/wodozoxorewo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a013fa25bf---lupilusasubexesunelalepe.pdfIn PDF document text
    • http://bakoca.hu/files/file/50339150498.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16083fec102d7b---lezetibusanifo.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/38027948589.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/taxaderovanaratejiv.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/dc304de1d014569620dd2f87f4cc04dd/vigexupofazi.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/20841540943.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/lanijozisoposunajex.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/rosiwokipatokotoviwepadin.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/47706297226.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9a8f3b9d---59583458542.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160805ab2ef762---49381601874.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/772130549.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/kolitinibesixezojefapak.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/98226072664.pdfIn PDF document text
    • http://teakdeck.pl/files/file/17797787917.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/71f69c86f277e2f0e6704759e5e2ebc1/nagevizumufabeputepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=takeuchi+tb216+workshop+manualPDF 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_off0000daee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEE 17676 bytes
SHA-256: c873a05583bbdb4e57f6631bab3d7bbff129a85dad91b6e8f1f6c460a704bf3d
font_01_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 11360 bytes
SHA-256: dd22fc04c121be92dd2556429f8254fef1108a95f8f0b29f824570a574b73f7a