Malicious PDF — malware analysis report

Static analysis result for SHA-256 347fa986446f779d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-12 13:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3b5de09f812bb80a7633edad5772db6 SHA-1: 8f7b4e5150382bf76f45891e1ea2a5e9186f1cca SHA-256: 347fa986446f779dde723ce2a6d2f7e4917050210f17fdbf48c8caac956085e1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://ymvii.com/admin/upload/files/kazakevisut.pdf In PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/49559582803.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/28540888530.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/27304644112.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/bujivexizezosifudojosem.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/bivevamisowewi.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/64788887491.pdfIn PDF document text
    • https://emmaushuis.org/pages/wokurinevafir.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359290b7d3d---41792783736.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/najozujinazudibisabe.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/karotomamowapefaxag.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/79550188055.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/42934362564.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/repelalokiruxutikatanij.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/6625175139.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/taxalopesigasi.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/xujivigevawekut.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/75206217994.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/10533434098.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/89213656009.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/samuvogadorojekikuz.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/vokafefujelitugaduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=quiz+game+offlinePDF 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_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 17160 bytes
SHA-256: 06556723ff2476ffddf67b6f6ed1b1e53532a31ddb52dfd6610dc88806398da5
font_01_sfnt_off00010f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 10412 bytes
SHA-256: d8d959ce0bd939f3a700992b7f2fbf1ae563ed4ef76e9a4a6b299350b12d4bad

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