Malicious PDF — malware analysis report

Static analysis result for SHA-256 982861847ada32b4…

MALICIOUS

PDF

77.3 KB Created: 2021-09-12 10:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be802f725088bcf02ccd352a3e5511df SHA-1: e49a4a702f421733ea61ce52571986716beacbb5 SHA-256: 982861847ada32b4acd0e67026fdaa657280804ddd74bba836a0cc2b05fa0317
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm used to obscure the final destination, likely a phishing page or malware download. The PDF structure and embedded URIs suggest it's intended to trick users into clicking links, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://coretry.ru/uplcv?utm_term=imo+add+free PDF link annotation
    • https://matricula.netlandschool.cl/files/donubumavipurogaxusef.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/57758213700.pdfIn PDF document text
    • http://packamate.com/userfiles/wabare.pdfIn PDF document text
    • http://roocenter.ru/upload/file/57521279626.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/suwuvevijojuf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328299a8eb5---viwafikatuvuduneb.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/mupovawoj.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4268a98c16586df1ecc628eacc7afcc2/wifutidazetenafuto.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/724845668.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/tukaji.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/32124017177.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/82772495043.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/3648232426.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/93588993748.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/sujibulunamajarapuxav.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/xijagumupuwuzewuditob.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/dozigeji.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090111342769.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/navan.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_off0000c7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 18848 bytes
SHA-256: f8db56a7536fc46cbf74a7b0a7e51f59b0ff2a3a951036621ea2ff0edc0e3155
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 9960 bytes
SHA-256: 4a62cd0a68e9cf6d0e58fcab5ba9ca7594b0b77686133c3199be99464393ff0d
font_02_sfnt_off00010eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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