Malicious PDF — malware analysis report

Static analysis result for SHA-256 5780b2a7d1a4bcbe…

MALICIOUS

PDF

81.8 KB Created: 2021-09-22 13:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 293d5194f95af34795174795e91f7caf SHA-1: 5589f611de64de313cc6c00aea63706151839323 SHA-256: 5780b2a7d1a4bcbe39521cfc1c31bce6c628f60f1c5f33f898d787ac871702ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. One URL, in particular, is associated with a search term for downloading Android emulators, indicating a potential lure for users seeking software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://designbeginnings.com/upload/file/mufonasug.pdf In PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/32788509275.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/ramudolerima.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/towetuwub.pdfIn PDF document text
    • http://synphabase.ch/upload/file/56127405622.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/31334826106.pdfIn PDF document text
    • http://secoinblock.com/upload/files/xipedefuzuxobolebetefi.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/30290952746.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/menidini.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/wibenepilub.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/10252248721.pdfIn PDF document text
    • http://domario.ru/userfiles/file/19199512401.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/18769711814.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/xedivasupuliwis.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/26816115969.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6022e354---78469721977.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614382b8641c9---40439268340.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/wovijidevup.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/54320951795.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/magolovodixa.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/1996406824.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/bepexukow.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/40990818586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=descargar+bluestacks+emulador+de+android+para+windows+7+gratisPDF 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_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 18356 bytes
SHA-256: 78168935126b14fcbecd85972660f93f2daf278b9dddfedcfccdc700c5646639
font_01_sfnt_off0001070f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F26 11328 bytes
SHA-256: 642787f7378133640ef8ee421df294c8a1cd7ab1479522d31d709ea36acdfebd

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