Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbba0495333b009…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 16:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 030536d7ead0fac4e69aa55134b78d3c SHA-1: 2092755c8d5897586911f752463878c2686fc123 SHA-256: ccbba0495333b0090700448c095a74646c8302e75761344e159dd006eb51cbc5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=g+major+7+guitar PDF link annotation
    • https://stomatoloska-ordinacija-rijeka.com/files/bidow.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/tizufe.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/rekiredipowakulixumax.pdfIn PDF document text
    • http://exima.kr/userData/board/file/81437497066.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/79013148450.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/lulutumakurikesozoxigo.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/27038167987.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/11375598701.pdfIn PDF document text
    • http://baove247.org/upload/files/gepudawos.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/fapurujijetazi.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/zarumewilewen.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/bitedepabepivoboponog.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/60713369624.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/kudemasugubuzewat.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/82674546904.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161464c6b061c5---39333858865.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/dakitajij.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/lopiroluvavoxa.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/sopekugerudarodufabe.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/87475065783.pdfIn PDF document text
    • https://miminku3.com/contents/files/votupexodikiziziliwapo.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/filika.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/fowolexizagilidoduz.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143484c619ab---2074814834.pdfIn PDF document text
    • https://umutfm.com/resimler/files/fatenezovegonuwolawepiges.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/lefokuboviwodugitetep.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_off0000b0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F0 15460 bytes
SHA-256: b3479aae805154b334e1a680e37c028b5274ae6076f43f216a72166d9c591bcc
font_01_sfnt_off0000d89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89B 10320 bytes
SHA-256: e950d71342402d35b570fd694cfff0129b6c5ce3866bb7e88fb7a8200f7bbad6
font_02_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1