Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ede601045a040d6…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 07:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 867f796ac121675cc15472d53cc3d39f SHA-1: b796d0906102ad6d642e5e59494ffe0b061067d3 SHA-256: 9ede601045a040d6ff85b8af476f0f2508c5e21b90585fabd9ada15582085de7
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/pigasemega.pdf In PDF document text
    • http://nw-line.ru/generic/uploaded/pakapixewofo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2087485e1d---99820423900.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/tinomawaxizexewamis.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/nivadubige.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210904184742.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/pojikexugeviji.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/84e0f54f38da05a087507f12be4b6cae/29401660692.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/91240513402.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.com/filespath/files/20210801215013.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/lakidojovijaximuwatu.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/32667527178.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/3d52b42a140445fc121dac378fc7ec2a/najarumafevoja.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719f36c6228---moraruwafuzepawaz.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/82a05fef5f2c5d6344aad6070822c480/52101809446.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/99186011548.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160796b1db92a2---18654740884.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67bf5be9ea---gapakililona.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3p9jlgq8pb08jp8011q0vh7ri6/lomojunukila.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vscqjsnour0a01v4dl5rei61d8/duxomixejexaxigikur.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/3c10987a28df523b05b76d54bba71bd1/47830964412.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/kevemokalufatar.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/91433038401.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/47qovtmvibge6rffe62i1q8dp6/lubisobij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=manual+handling+risks+and+control+measuresPDF 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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 16964 bytes
SHA-256: 856b62ceb657b9719ca724260ecd39e1eb50798db4f64b70658b81000a169c1c
font_01_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 11000 bytes
SHA-256: b0a8f9ed3357c63ed3a720055a9e11b43aecf73a9440e3e76fc4448bff74f619
font_02_sfnt_off00011e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1