Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a14ed4f1251dffa…

MALICIOUS

PDF

86.2 KB Created: 2021-09-06 14:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2f32ed3401b013095c1a5e5b0661b75d SHA-1: 8a708fd43f3041c38a43ca2ecbb1195229e39a04 SHA-256: 1a14ed4f1251dffacf518da83838b1001495994803a77bf3fd7f3a80598c5656
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to potentially compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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 http://protok.pro/upload/files/14667747460.pdf In PDF document text
    • http://maihome.hu/admin1/file/67647919458.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/pawufajawu.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/78c3dfc6ec5cf886a53ef0f860e092f0/rimoboxuwerinodawiw.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/lufojobupafesif.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/824ad0d4290cd943c3504684c56a7fb6/22298578226.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0ec97c750---nifabox.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/8kq24qdgoqe78i3uab8n8803f3/55564308612.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/48037704715.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/lopesikonasogifekeba.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/89372064317.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/pivijizumafife.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/xeperufowuvuxikigupin.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/md6iql55975dabvu414qr0hj32/gixetozoxivaxiku.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/towujijop.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/42060718313.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f284e849---12942270714.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/tuxexizor.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/jorenufa.pdfIn PDF document text
    • https://bselink.com/userfiles/file/39906337522.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b028d7238---wobasufulewon.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/zigudedosalepuseg.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16087d4c669350---mewojaduwejibikifojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=%D0%B2%D0%B0%D1%81%D1%8F+%D0%B4%D0%B8%D0%B0%D0%B3%D0%BD%D0%BE%D1%81%D1%82+1.1+%D0%B8%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC02 24600 bytes
SHA-256: 21045fb9bccba8dd53cb9efb93fc2bc0b709778c4549f22e2f25160c4cd96a90
font_01_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105
font_02_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001199b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199B 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_04_sfnt_off00012eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB1 10996 bytes
SHA-256: f143fcb160f7cebc670ab900b69321d5e4abb93e16c314b6c831abd7c811fa58

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