Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bc89ac48fdd4cc…

MALICIOUS

PDF

67.5 KB Created: 2021-10-04 07:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 01546b50f1556cfa715b115356c4974a SHA-1: 7495ca8a8e8a61fce1e72e47fd341253f13f149c SHA-256: 68bc89ac48fdd4cc02cc73000a8e926d4222b288b64caed5f4915ebc518107d9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a malicious phishing lure due to its image-only nature and embedded clickable link, a common tactic to deceive users. The heuristic 'PDF_IMAGE_LURE' strongly suggests this is a screenshot designed to hide an action trigger. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16155b5445c5f2---8652078314.pdf In PDF document text
    • https://beautyyaurient.com/editor_upload/file/15330646697.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/nukirafefusadapemo.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/mopotusemulijukipax.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/51676287023.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/terex.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/87148697848.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/gebon.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021919173356585.pdfIn PDF document text
    • http://arsvet.ru/img/upload/doluxujeniminavisudu.pdfIn PDF document text
    • http://italy-ex.com/images/blog/file/tuvuruvubogosuxe.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/jikoropelojakeneboremeso.pdfIn PDF document text
    • http://pnalog.ru/images/file/demezopikodamoferizi.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/nediliwadawexurona.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/65940520559.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/laweni.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/16457756277.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/42801406827.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/47010627972.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46233838175.pdfIn PDF document text
    • http://jin16888.com/userfiles/file/12831084295.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/67082036989.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137459d78c90---boras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=people+that+bite+their+nailsPDF 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_off0000ad1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1B 13764 bytes
SHA-256: a5751cafc9fda153d3e973640b18f3bc7418341eab3a5d574724a19f3fe5f6d4
font_01_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 10488 bytes
SHA-256: 009429184033932b0775187b7163607104c9d5bee7062a72bb953257d72e805c