Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7098baa92e4a39…

MALICIOUS

PDF

78.2 KB Created: 2021-06-23 02:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7316920ab29889e00b749b4fbe97bda3 SHA-1: 17202906d4d858cafdd76a0c1f3b1ac1d985b570 SHA-256: 5d7098baa92e4a395f27841007578c64c93007b319e78353777cdbc360cfdddd
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, evidenced by its extensive link farm pointing to potentially compromised or disposable hosting. The presence of terms like 'cheat codes' in URLs suggests a deceptive pretext to entice users to click on malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://chcial.ru/uplcv?utm_term=beyblade+burst+rivals+cheat+codes PDF link annotation
    • https://flyingfish-stay.com/userfiles/file/69033914469.pdfIn PDF document text
    • http://gtshotel.it/images/file/88835056654.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609100929b77e---nexijiku.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/bcb06e0d346f343065b7e0fbf235558e/65860841426.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be046fef367---kavizozoxififivazaregigo.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/v40kbmia4qls1377g0ulj7iuit/meromominevepe.pdfIn PDF document text
    • https://noddy.nu/images/file/ziwexelanidefisot.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0516167b25---nifikedikujutarilokosiz.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/kugironazixusizixisu.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/guniwoba.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/larow.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e4b6538c6e352ba7924515d189d194be/vuwusoxeponoxevaxe.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210611_0E8104E5A4B44700.pdfIn PDF document text
    • http://cocoal.com/uploads/file/powavisezufidojegavu.pdfIn PDF document text
    • https://bloomeng.com/uploads/74905945689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 5380 bytes
SHA-256: 51b925881ab7d935e4c73b4ce4109f5cbe62f5c50624eb8b5a784e7d23b983a0
font_01_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 11032 bytes
SHA-256: 1791f535cc9f6c7cb563f326dc6ce0493bccdc3ff9c786667507f21a4b2bb013
font_02_sfnt_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 17156 bytes
SHA-256: b2489b5fb56b9f3491858d4f43b3243df97a451399e37b337e17cb09261bb7ea