Malicious PDF — malware analysis report

Static analysis result for SHA-256 302f651abe04bccb…

MALICIOUS

PDF

73.6 KB Created: 2021-09-16 12:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 812ee067f31c2ce1de764d0c394e0507 SHA-1: dde2dad209ea4e304bf32b38d82bbd66f5aecb66 SHA-256: 302f651abe04bccbcfc87fbc689cb22b94e9544ef2d2c1e6e7e68c9d9178c570
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to lure users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://studio70.eu/userfiles/files/36165183463.pdf In PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eea6e9be1f---kegogunotabatajexu.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/vopiku.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/q1dnes974hoav1s415kc1gu9hm/mufigoporubegofid.pdfIn PDF document text
    • http://wdnederland.nl/file/8321414488.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/78366813348.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/siviwazowugelix.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/8286205741.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/40543408409.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/lugezexoriwukuxulotopolum.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/fefipek.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/menawugi.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/jubewizeninawamavupejep.pdfIn PDF document text
    • http://vektor28.ru/userfiles/file/bigimupujus.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/xezexolapu.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/lusekekofowapatifiwowelu.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/81717866709.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/85229945754.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210905_FEC4017D4593B157.pdfIn PDF document text
    • http://artospace.com/pics/file/58651881837.pdfIn PDF document text
    • https://flyags.com/editorResources/file///bupapibov.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5ba2016c0---21644659940.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/31072511586.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/dg6c0phonk4u8cj2oqdohlo7f4/xejanusefudomesoluluzew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=love+island+usa+season+3+episode+1+watch+online+freePDF 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_off0000bca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA6 16480 bytes
SHA-256: 00f7d9fff2130bda055321a6562e796c586d191deafa66499d26a54353b667bb
font_01_sfnt_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 11152 bytes
SHA-256: f615ec128f3c4bb0b0da7cc64ef2cb3598c8bdf1cdf847f5d9b5c54e8537b451
font_02_sfnt_off000100d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1