Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4536e3986ea9995…

MALICIOUS

PDF

78.5 KB Created: 2021-09-09 02:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5e18fb763536bfc1ab96a20f02cec02a SHA-1: 8ebe49edd0fb4fc8ceac34a4aa9fbacd7f9cc27a SHA-256: d4536e3986ea99951126b55037d5b16d4eedf6c8662b450aae9d36763612aa27
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://infrive.ru/uplcv?utm_term=ordinare+applicazioni+android PDF link annotation
    • https://coverline.ro/userfiles/file/18812638706.pdfIn PDF document text
    • https://ksboutlet.com/file/files/wonujekorogazozelinoj.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/64869029575.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/43125157083.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/24650314951.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/zibena.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/midipotedaziritotiwimejuj.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/67081254663.pdfIn PDF document text
    • http://dytac.hk/userfiles/nikusofafefudosegunixivad.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/32213933678.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/nagemetedasa.pdfIn PDF document text
    • http://belloverde.net/emailer/file/tekidodumesikedulu.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/75302882307.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/58827914932.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/lakenajepe.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/39906950563.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/tagatisolumixawuxumiluv.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/97266888338.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/wowatawijebuzuwedut.pdfIn PDF document text
    • http://stromzeleny.cz/file/30574112971.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/mikan.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/guputav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 10328 bytes
SHA-256: 319e763096c1856eaa2bac8bec7cab2edee6d8e76a529083543401b812d948b1
font_02_sfnt_off000100f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F8 16688 bytes
SHA-256: 535191cd1fb4693fbf709fc24c70ffb94d050348be51a7a95e8327d603a3b5a9

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