Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e96ad59b8a72e7…

MALICIOUS

PDF

80.5 KB Created: 2021-09-10 12:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41e2dca06cad698972da51ce1b2fe0aa SHA-1: 0cf32465f22d695f5d71265a6036913fc3d035ac SHA-256: d5e96ad59b8a72e71e704d990974e8c113880fff1b19b943c78f9a797ee7b4ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=strongest+fortnite+skin PDF link annotation
    • https://tp-pos.com/uploads/image/files/68484150243.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14312274726.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd7541c3679ae442a78fcfa28578a891/23204310520.pdfIn PDF document text
    • https://thehouseproduction.net/file/demetufasapumaluzedabamo.pdfIn PDF document text
    • http://pedraferro.com/files/files/14022824869.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/59685494471.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/69582634447.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/1840460990.pdfIn PDF document text
    • http://systematix.pl/userfiles/file/kapun.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab523d887---foxerinuvavibejipinugoj.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/esk2k52ardt14jtvermkiqtkd7/99150322399.pdfIn PDF document text
    • https://cplastik.net/data/cms/file/vezeporoginatifeg.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/ralawotoxegelimun.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375a411cfbd---woteratalixifefo.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/munumujijevu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376920be295---kigalowevosijore.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ae28c83d1---bagunosibos.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/26298355450.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/b8thhn7mm2d2nlc23gd9veo296/11081823719.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/2460161691.pdfIn PDF document text
    • http://ihdbd.org/upload/files/pitizafemufofolifuze.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/24667077164.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/70273420770.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/pejomajeg.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/rafibajekomusapib.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/kuwagagoxo.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_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 10348 bytes
SHA-256: e3402796a717f0a29a7b1c89b3566ea074592bc3441c19aec74c31beacba5644
font_01_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 16948 bytes
SHA-256: ee707911697810d8155fc410580b5b7ad0f2685a17425300a7856d1a319bb49e
font_02_sfnt_off00011c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1