Malicious PDF — malware analysis report

Static analysis result for SHA-256 096d8f28be94cc25…

MALICIOUS

PDF

70.0 KB Created: 2021-09-28 09:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8a879113d7f3ff58072c5151d706a8a1 SHA-1: 01960045341ba2d91a30b8407b5fa657de627e3a SHA-256: 096d8f28be94cc254f62b0a659f537cb87a0f4c7d08a0a3b83b9e759957a7b20
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable or compromised domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a link farm, directing users to potentially malicious content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://nomylo.ru/uplcv?utm_term=mega+moemon+fire+red+rom PDF link annotation
    • http://taketty.xyz/js/ckfinder/userfiles/files/sumal.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/58100572186.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/wabiwojatub.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/rotop.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/vumoko.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/9591696559.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/joduzexonawapobus.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/vogixamenifotumezediki.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614f3402906fe---53868855428.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/52394378213.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16134c338440af---nipiruvisufijemiwukilida.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/tosavowi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613381519c598---37268640137.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd4d1afb5c---44061088274.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/52826432147.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/90967421774.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/47620837439.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1632154366.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/98080715282.pdfIn PDF document text
    • http://taigesw.com/upload/files/19270507545.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/2149988199.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/52181427692.pdfIn PDF document text
    • https://extractos.assaludips.com/Proyectos_PHP/gestor/images/file/40686651770.pdfIn PDF document text
    • https://ocw.tw/uploads/files/5850522717.pdfIn PDF document text
    • 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_off0000b371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB371 10376 bytes
SHA-256: d08c04d6a443b6a2bc2d5c4840b3cef2a2cfae342ba3cab1a75c2b74112f1c9c
font_01_sfnt_off0000ca9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 15472 bytes
SHA-256: a49a610e6237497ac471abb0c21bce157a0b0b202aa126a6839a57b9ec04a75d