Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d2874ea3c494fb…

MALICIOUS

PDF

150.5 KB Created: 2021-10-09 20:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0323f89454ee2e541ae920bf70a965f3 SHA-1: fb6258e941899d45322b1dc2ec8a7a63bf434fd0 SHA-256: d0d2874ea3c494fb4bd645da8f5cc2f2c244399606a2062d9a24e597666c2f4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and extensive URL usage suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://krisoc.ru/uplcv?utm_term=important+philippine+cultures+which+are+needed+to+be+preserved+for+cultural+identity PDF link annotation
    • https://dammesliepas.lv/ckfinder/userfiles/files/muvuvupo.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/zugidosasekidawovexadode.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/10484110447.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/zixelamoku.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/jazugigaxovepul.pdfIn PDF document text
    • http://apcmagon.com/userfiles/39869224709.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/nowuj.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/muwesanuwinewuporirexi.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/rumedadofudafomoditup.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/17420838247.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gebuwimojeduterinijudexuw.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/36353931900.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/48983659784.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/85170434067.pdfIn PDF document text
    • http://fxlcd.com/upload/file/48608893409.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/36490220235.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/40248027184.pdfIn PDF document text
    • https://tdfstore.it/file/kozeb.pdfIn PDF document text
    • http://hiniceshine.com/upload/77226123515.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/jedijedanigaru.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/lujufidogevikurije.pdfIn PDF document text
    • http://hidropro.hu/upload/96553931288.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/03d1dc33d7302af87f54a28e75f27d2f/gapowafikifapazut.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/2811303637.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/11772021849.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_off0001dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFF7 11340 bytes
SHA-256: 5bdd4f53b2534d459fd7cc72afaf964edaa004bdee1aef262dc15e532c860cb5
font_01_sfnt_off0001fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21259 21960 bytes
SHA-256: 5bbc7870ade2c1b1d6d39ab9414f5705acb6764e7ce1b2d861f9a425352832bb