Malicious PDF — malware analysis report

Static analysis result for SHA-256 037ba12f8848f52b…

MALICIOUS

PDF

77.6 KB Created: 2021-11-10 06:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b6b2c09a7ee175ccdcb4102f5de53e0f SHA-1: a5297cd6f83174e3bdd7e51b99187aaef3ce1ba0 SHA-256: 037ba12f8848f52b1757f1aaf45dc45a02949ce0d79f527c8bdb76f3669561d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pnvvr.ro/userfiles/file/65918200451.pdf In PDF document text
    • http://togclick.com/media/userFckfiles/file/poravakefimelematefata.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/rivarirateda.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021110511294338.pdfIn PDF document text
    • http://mayjack.com/upload/files/sopuru.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/zewovozidiza.pdfIn PDF document text
    • http://topflexsports.com/uploads/vatuwesogoxepomazopeti.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615bae3a91cb1---musebizufepavebupogepi.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/vamizoze.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/13329017202.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/loxebuvemojumabu.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/4308893912.pdfIn PDF document text
    • http://reichspfarrer.sk/file/ninulam.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/jovelosabefi.pdfIn PDF document text
    • http://maidichike.com/upload/files/27503657553.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/soduvulijuturejevazujav.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/27516185839.pdfIn PDF document text
    • http://kam-era-man.com/327547897.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/967301642.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/golipovezep.pdfIn PDF document text
    • http://net-marketing.hu/images/files/vefesagelusakak.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161859dfc166be---kezejaludodumaxiwe.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/warororovutowubowa.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/patonetofititiwalutatuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/u-9XGpgKpwY/uplcv?utm_term=candida+albicans+30xPDF 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_off0000c6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 10480 bytes
SHA-256: e08f06b822aa303da1598b8bedd3a32e77850ad55b0a58962f6e50d5a76dfa13
font_02_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 19620 bytes
SHA-256: fb3ce2dd639b3d4fd2fccb8e70b79a0ea3cd214e4032cdfe2a8d8f9aec7cdbad

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