Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e303b333d3501a…

MALICIOUS

PDF

88.9 KB Created: 2021-08-20 15:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a16079bcc62a9562a4bcb91fe74eca5c SHA-1: 3e0432d836f80696937122abf24d0488b3e33d1a SHA-256: d0e303b333d3501a21099da80199b69c262b5e402a1c4ce4336f0b72f24d6717
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to deliver a second-stage payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f17089663b8---67666544570.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a57b183bd---jawesozeme.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b4e52813---genotudupa.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/27682656336.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/kubuxenedanukexekarekewa.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/69889643905.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/rjjdhklosola95b5r3tkufgo72/90223777480.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/82411393583.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/cacc5b9537f1db5f5553fdcb75972ebe/wevifusatagusotidib.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d1f879f8a---dumubefugipadabopi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b059012a8e---zixogekupewelepik.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/8220297234.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f60c6d81a---xoruwamita.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/73315933992.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/31fbl064ptmqhe9n9uum6s2fj2/67925509127.pdfIn PDF document text
    • http://bjjiffy.com/upload/bigowo.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/vefutamubegizu.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d68340f8334fa1191001de0a510f08d9/5952691279.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d343ac1b6f6154dc5fa9e70cc9b35fc2/1922083636.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/52200723291.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pisekajefusotevup.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f7946ce5da78d8b013453b61d93a7f9d/sibamegerizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=integracion+por+fracciones+parciales+caso+3PDF 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_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 10776 bytes
SHA-256: 8960dc99a940c7cf59e799376acd7d9a04a6cd3d18a4305a6045b474cf500068
font_01_sfnt_off00010c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001249e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249E 18620 bytes
SHA-256: 1e5c29d49faa423945dfc37b7db9228a187a5d8e8c0136a5ee803c30a91b0d85

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