Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9a9b5c1f8067d7…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 01:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 184990d46a4271b640dee6364c5f66ea SHA-1: 0a0f7040bfe18d438b4b8571208b5c6b054a8d06 SHA-256: 2e9a9b5c1f8067d7343611ac83a7743b3a83c0bd83e0e13c3142c7018d186aa3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to potentially compromised or disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://anabakorea.jp/userfiles/file/lunerefifipowakowiseton.pdf In PDF document text
    • http://kachelofen-prommegger.at/fovumokurinug.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/30053116689.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/46968369545.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/kizaroladebifojaxajabapun.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/jozinekisolubabibitif.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffb5039822---75712544072.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161382fea2a21e---31172070050.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/vupatirodunigexi.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/32789205637.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/lorapilomuwadososo.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca82f8915d---kafisubugofowabamugoduv.pdfIn PDF document text
    • https://avenue102.com/uploads/file/22090197204.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/lalosipewebilotosivak.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/10716142546.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/62f7c42c57fe5160269c499f6e5a47cb/wopebelipesajilo.pdfIn PDF document text
    • https://tarsiman.ee/files/file/vafevegafomatofuzevosujiv.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/radozid.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/h2d0p54oif1kp6j6kdi8sfpatg/xegakowuwelakawatalulo.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3c402416fb6fbae098cac6c5cc97429e/gisopesotof.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149d839de3fd---vepenefupimubivepepu.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210920053147.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/nofeluronipuzewukokizew.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/6095458856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+power+book+by+rhonda+byrne+free+download+pdf+in+tamilPDF 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_off0000b15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15D 14916 bytes
SHA-256: 0ee201ada2f8c56b2837bd5f51e3e238d91d82e8d37890ac18bc55e4f9aa67fe
font_01_sfnt_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 10992 bytes
SHA-256: 6dc9d70ddbd430be0be58291b33114fa35b03e6d1aa704591ff4ea8d124dd9e6