Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3f2c23e06870a8…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 17:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f3afb101cd739e4e940a649b1e596881 SHA-1: 2565b075924793a2653ec0900bc32bff663d758e SHA-256: 0d3f2c23e06870a827f9c48127b3b498fa6d5e7350fae772d06b9d46e893ada8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to an IP address. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://inwebjor.ru/uplcv?utm_term=minecraft+furniture+mod+for+android PDF link annotation
    • http://medianet2000.net/amm_prod/image_news_popup/file/sedojukadowigifevupupesin.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/vixikebomoreveguk.pdfIn PDF document text
    • https://educhina.mn/editor/files/26790271775.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210912055734.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6eeb44ada3626825d0d7c6c1ea2981bf/37036165113.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/kuxowaraguzupexi.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/30642834369.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/19860826634.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/wivavelarubabu.pdfIn PDF document text
    • http://myesen.life/userfiles/file/90132139122.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/81452132908.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161443bfe1ce63---40382737647.pdfPDF link annotation
    • http://gemcom.org/userfiles/file/16304169824.pdfIn PDF document text
    • https://tonitomov.com/picture/file/59231628993.pdfIn PDF document text
    • http://mcutech.net/files/xejaxur.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/kekitasotivet.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/najozujinazudibisabe.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/4432280474.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/giletazimojolomowewane.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/8108090429.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/faxirimulis.pdfIn PDF document text
    • http://bscartridge.com/pic/gevusopagopepu.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161324d33614b9---verozegi.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210904071500060.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/zelize.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_off0000d239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 18216 bytes
SHA-256: 601a5c459a831469dedd162ddd7365e6cfaa5542df40c680c1dbd7870a1c129f
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001199c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 10516 bytes
SHA-256: a03f5bcc48e97b6585b6f7e0b90d79f9054a38933505964107186630dd7879b9