Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a863069a1f6229f…

MALICIOUS

PDF

70.1 KB Created: 2021-10-04 00:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bbdb81c09e29e694747cbb8f931b0d9e SHA-1: 033011442d58565254d19eb7838eab273a9afe58 SHA-256: 0a863069a1f6229fe6c5301a02572c7187ceb728c39a2346eda7dd2ff840351f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=the+book+with+no+name+pdf PDF link annotation
    • https://mrpressconsulting.com/UserFiles/file/jonanabizomidijufuxu.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/92112205852.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631056302.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/52237420985.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/55224162311.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/85077568351.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/rabagatorufo.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/tafelefujixifejufiki.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/lojixoged.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161318ed0d7181---ranodepoxarobuzife.pdfIn PDF document text
    • https://redormiga.org/sites/portalin.es/files/file/gobujavonusabixexepa.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/28972435218.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/98708088102.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/32322594409.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/povekukozubet.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/34204152126.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/jumonedoxa.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/13581485439.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/jepilavojodegupaw.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/gajemizajaketake.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/77194144649.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/kezusabi.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/f3aced40c0b69fa99c6592c784787265/xuvisukidolugat.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/pamuletasipa.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/vigapirusuzifiri.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_off0000b1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D7 15952 bytes
SHA-256: d34662e002660c31f95897736869329185efa534285fc0da80d59e1e58ba533e
font_02_sfnt_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 10728 bytes
SHA-256: b9ceeb6cdf21ebdc9a8a9ffd0039472ac9f28bca86fd1dde4529084554ecc0e3