Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1927c4ae48ea4f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-10 21:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41f1d78a715e9766ce3e7e14e57cbb4e SHA-1: afcfe075c7fbab6269966912bf3749605f20ea84 SHA-256: bc1927c4ae48ea4faf3b0df7d37e2bb0d6ae3d507344047527a3c9625479153d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection and a high ML classifier score. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pistant.ru/uplcv?utm_term=the+iron+knight+read+online PDF link annotation
    • https://weldingportal.it/userfiles/file/27937139258.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/28638267414.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///tufus.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/wofedixoxubunape.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8823346707.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/livalu.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/komisa.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130bf235e2ef---gijudufovo.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/47300827975.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/nadexepajufusupilakawepal.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/mowoteg.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/80661816248.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/21662015482.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/somigalibitamiwilene.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/37027807190.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/dusivorajoxikerewe.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/mozugawujepoku.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/wezaxolokupa.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/mogefikemoxemadosozevad.pdfIn PDF document text
    • http://erdbau-rauch.at/38822943026.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/38537381294.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/25970034469.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/kokulududiw.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_off0000d5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5ED 17488 bytes
SHA-256: 32dd0fe8da4f370e37da87c920fbe99d00ee7b0b2555fb31e766b7a7369121df
font_01_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 10412 bytes
SHA-256: 0f5beaeceeaedddf7fccf7a33ad41d12d2ca1b659f409da72fd63c6a642c0b24

Open this report in the interactive analyzer, or submit your own file for analysis.