Malicious PDF — malware analysis report

Static analysis result for SHA-256 30432be9f64d947a…

MALICIOUS

PDF

88.4 KB Created: 2021-08-22 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 415833a516794960e92adc270ae4d7ea SHA-1: 2f4709099d2299874767d5bcaed8c853e39a44c1 SHA-256: 30432be9f64d947ae87d09ce9b497ecef51bfa78a3d41f83178429362aaeecd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://juha.be/_files/file/laxan.pdf In PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160946078bca23---43952550157.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/63828066570.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160750842ab041---lobezemudezil.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/2ffc966b0d58eb06fdd147b63ba6868d/66791861658.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/80358931253e0ada58dbfd8b1ff429e4/jiwisurokur.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/74q7sfn3km7h424n510afp6cn4/82483581683.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/00a8fc3ff88fe711aad84e8065bbe846/32268684919.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d76d9febd4049269bc39f253970b4983/74304882938.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/955bc22b8076ae02cc34bcb9a97f603c/panerusejipegut.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/japoginagipuvena.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/daabbfdd7dc1a74447bd561f11135812/22123636364.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/8892908343.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/bbd645fcf3beb2db64823e4ae852d110/sajudotowutavaso.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081863e26f86---zibunibowofegolotaz.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/77119853105.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/11192919248.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/82042263316.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1611a89114fc49---resamewe.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acad52e2d49---83900927639.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160905a1b5820a---nufezupaxoxepux.pdfIn PDF document text
    • http://stroi-sistema.ru/img/36363098060.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/v4d4j5c2kn282c9v5knh3kg5en/wisaribegogujinegabite.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/39419f592d129a9d632015e236f4f7e7/volubexav.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baed71bba14---89602413409.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/85364757640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ejemplos+de+acidos+hidracidos+con+las+3+nomenclaturasPDF 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_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 18528 bytes
SHA-256: 024d4c64c737e7ef05086ed4369c9709b17a3ebccb9a6af8f754784eef2bec14
font_01_sfnt_off00011e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3F 11164 bytes
SHA-256: c318975a53dd80a061216020f76ca367f09c39fccacef2c2795efe316fdd2fce
font_02_sfnt_off0001381c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1381C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1