Malicious PDF — malware analysis report

Static analysis result for SHA-256 a990eaf05e377326…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 21:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 20cb54462e29bce9472f7d4c2fe48a61 SHA-1: dfafbf67b556eb36cb1379a5d825be7636ee5d1e SHA-256: a990eaf05e3773268074e71e3670c69fd55e0cc1fbe9695f272dd21816d0d2c0
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://cpghollywood.com/userfiles/files/77254123996.pdf In PDF document text
    • https://ooo-kenk.ru/userfiles/file/suduwefobiroguwudavid.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d370b2355f788e237595a39eee4726a0/50370979015.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/jenudawuwegedibewabagorep.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140127c50254---71467030468.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/wokuxadolavoluwuponobeja.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/savejibutesobotatavat.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136db90c2db7---17148925250.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/bamabani.pdfIn PDF document text
    • http://isvpro.com/custom/files/8984133211.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161413a6897f94---figaxobed.pdfIn PDF document text
    • http://abwessex.com/uploads/files/narazibiviga.pdfIn PDF document text
    • http://hidropro.hu/upload/zigaxabize.pdfIn PDF document text
    • http://erpos.sk/data/files/memebutojujusarof.pdfIn PDF document text
    • https://biocoils.com/img/file/36881387615.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/xaxizuwarokoxekesuwolu.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/xoloj.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/86793558863.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee37dd9cc7---zubonetogilunuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=paid+apk+torrentPDF 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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 10264 bytes
SHA-256: d4c4645de894415a4ca38f0500cfdd52e31751444a247cea6211aa3d1d8eecbc
font_01_sfnt_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 18216 bytes
SHA-256: 82c9517575003465557b395577d07d124fcc33d5e0654ae6bd59aa8a21d61889

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