Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec979c5ef775f6e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 03:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f8371c637e0949f4c2010a10d6aa408e SHA-1: 19f81ed917810c717cd84254b179be70eb13f65a SHA-256: 7ec979c5ef775f6ed766c84c8a0c518975638652ac60258346a6afc1b30cacb4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are linked to disposable hosting and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a secondary payload via the embedded links, which is consistent with phishing or scam lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=download+manga+pdf+one+piece PDF link annotation
    • http://travelport.pl/userfiles/file/bimubilodagufen.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/17403789934.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/29527994275.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/papukopebibagusemaxameme.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/zorasusexozujovatadufo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a2c20fe44---56000324046.pdfIn PDF document text
    • http://33podarka.ru/pictures/files/gulanafamutukotoxude.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/79145082556.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/56126494756.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/60066433561.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/654712307.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/65192118108.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/vipovamujiz.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/94257029548.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/63120793156.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/lalalevalagiperalil.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/94387632836.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/84049618295.pdfIn PDF document text
    • https://123natura.com/stockages/files/78232119556.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/zawedoj.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/67652401557.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/72492977906.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee6f20f7fa---sudemelole.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_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 20600 bytes
SHA-256: 0d12543b5573dda278d628d2668fc7d9f54f55a75815636f7be9c1cd27473c3c
font_01_sfnt_off00010bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12403 10684 bytes
SHA-256: 1ddfba73dd22fbed7f8e35d4aea313631deb32ee992670b59d193c8e32ec79a3