Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c221bdddad7fa2…

MALICIOUS

PDF

81.0 KB Created: 2021-08-18 23:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb46250c298d212e1e37aa3da54486c8 SHA-1: 5c29f2569c5572c61caaa2768a88874983b098fe SHA-256: 00c221bdddad7fa2edbfcd71a0211cd1d97af05a1c4d5418c6be60c2d8b6f63f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of numerous external URIs and link farms suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://betenagro.com/sites/default/files/file/nalarefogip.pdf
    • http://vnationwide.com/userfiles/files/girilafare.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762ddc2ed47---petukijojovuvezutetaxadur.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af0e8aba665---22290054551.pdf
    • http://ankamet.com/userfiles/file/ruwugeti.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f874262494---54297808368.pdf
    • http://markasib.ru/ckfinder/userfiles/files/63782002373.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/n9fpaaq5iqskb7mgedqp0ihdi1/nuwafogul.pdf
    • https://foodvellythailand.com/upload/files/pumumoxukefubi.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/9204155b1a997317fde091abfcfe64ee/mewotegakevajuwif.pdf
    • http://guides2alpes.fr/uploads/file/fokowepufaju.pdf
    • http://kemmurad.com/webroot/img/files/30763844858.pdf
    • https://northwestconvention.cz/data/files/movit.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/846el2aoeq0h0iqpbsmedgueht/59577770325.pdf
    • http://mecaniquekd.ca/upload/file/gerobuzilejumonesobez.pdf
    • http://clinical-pain.com/pds/userfiles/files/tumabutara.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7bf773623---80949097102.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160adff22815ee---sovujikemixizirinunuku.pdf
    • https://didacostruzioni.it/userfiles/file/77536697099.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/2c03ac28e41e180e122f16f3caa435fc/naxujabizefexasu.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/17136117998.pdf
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/78831148156.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e361c459---labubawujagorexake.pdf
    • https://floresdeserrezuela.com/aym_image/files/4219341904.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=public+policy+analysis+william+dunn+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d811.bin
27ce90c67d3d6f9bf0ba5ef0edc2cb73dc1bbe16045bdaf028ad25ccb78c44ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 10892 bytes
font_01_sfnt_off0000f111.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 16792 bytes
font_02_sfnt_off00010923.bin
19058e6825847e3f215f8b5e5cb251110cbb126c8fc79781a3c295dc56606f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 16992 bytes