Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c57e45516ac172…

MALICIOUS

PDF

69.7 KB Created: 2021-09-16 03:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 33c425a28a86e18e8dde51f5d5213922 SHA-1: a7acdbee29a465f7eaaf0d0eaf89342c0024b2b6 SHA-256: e2c57e45516ac17206923294891e341cd0f12935015bb44d22fa7b97c99581bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on compromised or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://coretry.ru/uplcv?utm_term=worms+armageddon+n64+rom PDF link annotation
    • http://dpsszczytno.pl/photo/file/wotemiwinizex.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/bomisulafigogarerel.pdfIn PDF document text
    • http://vpsystem.com/files/fck/9408706404.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/voworosedaxenomogowum.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/98073803570.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bfe628118c---tewonufe.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/31903282812.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/rexelepabope.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/najanuram.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/xusiliwuv.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/gemajifadadusitufigede.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cf52086a927d06556588c6664d77620/fosikadebufu.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/24647935630.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/457594524.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/11980359885.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161351d9e071f8---20697346182.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c02c1d7e9de1194c4edf650d2cf10328/53252829226.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/paxemimenetaxeserek.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ec62d87c592741b182ff68ce7a7b2d86/7095557837.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/91384339472.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/guzam.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/22929605543.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c45d646384---dalibewuref.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/sazixagewurexa.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_off0000b0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F8 15392 bytes
SHA-256: ab3c1e90b8c13c4331478b866e673d0371c601e257d6ed11dba8ee1ddd5f10d9
font_01_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF017 10596 bytes
SHA-256: 5afa032d0b4c9b941b5ac38cc455cc4f4bd1fb3b756d69418b36cc8f13eeb920

Open this report in the interactive analyzer, or submit your own file for analysis.