Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cd1d6dcedbceda…

MALICIOUS

PDF

80.7 KB Created: 2021-09-16 09:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00ba3dcaa58ededc34b75a8f6936af00 SHA-1: a58027225aafb1af5987ccee4c442939f2f6dbf8 SHA-256: e2cd1d6dcedbcedaed9ad892acd5e368b0a0ad8f6d00ae9046836396478843c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=cosmote+apn+settings+android PDF link annotation
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e17c1c914c---90895358404.pdfIn PDF document text
    • http://bluebossa.pl/files/file/marapirajaxivoxefare.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d50d049315a802444cc2279792592672/lemovil.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/kusurakejakosigasevewod.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/42692566594.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210901220056.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/458f0bbadcdca24525ae6b9656c1708a/67454680695.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/ganajironepukinedokule.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/belixukum.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/fikun.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/5763488605.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/pevezuxikibumebesegev.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/figugapotilulesepafiwapa.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/pororutebifisigisim.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/lunite.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/fumevekefumomosagito.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/letiravetipaxazaxa.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/151951254677.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/voladunegivalovuxevegiral.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d18b39f77---jimuboninajazu.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/jexijipevajidofokukav.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/44762824524.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af44976cb4---54833860866.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/84239568793.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/ziraduluz.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/64515557985.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6b239df550902c64926d7ff8fc54f5c3/riworunidik.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_off0000d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 10720 bytes
SHA-256: ed43e0977301433b25ce3a97f763011cfb57fb3ce3041b17788d3e9f648b8295
font_02_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 18652 bytes
SHA-256: cac09c6828f48f3d866652e8e3ca6645bbb7ec2b82cfa33bc10502dce14028f6

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