Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc1a001a0061986…

MALICIOUS

PDF

84.6 KB Created: 2021-09-18 05:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cea4a506f1965b748b2dc2d20b079785 SHA-1: 12c14b3e16b36afa68d73220262788daace2380e SHA-256: 6bc1a001a0061986a8db62869fbbb78d353ec710da1ab981f4ad3641c9a87314
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or abuse multi-factor authentication. The embedded JavaScript likely facilitates the redirection to these malicious links or aids in the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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.
  • 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://catamma.ru/uplcv?utm_term=use+apple+music+as+alarm+android PDF link annotation
    • http://pointerboards.com/uploads/admin/files/pulijimerasafazob.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/vigudirabeluf.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/21166350313.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/xesenafoniluzivuxuwul.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/12804692539.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/18h14o9uaa6morcgd763a011t3/701770825.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/wovutipefenetolusaxonitup.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/dirubiseditaro.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/15232134670.pdfIn PDF document text
    • http://195exim.com/datas/files/nigakapefagovax.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/zifetedejewilukifikotora.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fbd355d2a---65953254577.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/gezinesopafebajupunipin.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/67490273691.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/71802077776.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/15259104780.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/46548232513.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/51598121616.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/s83jgv5rjuqav58uaf0gsed8i1/pixazosazixuk.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/losujosamabefumebej.pdfIn PDF document text
    • https://ntc-container.com/upload/files/48288106774.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1f15c93d2d9cfa3139648f78e9d9339e/35159644192.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614509912a886---47262723362.pdfIn PDF document text
    • https://kermanrooz.com/img/files/94008646506.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 17428 bytes
SHA-256: ac6cc3f559c10d002be3bb0a327565095b30f1a12ad0bc390bbb9a759044254c
font_01_sfnt_off00011474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8B 10684 bytes
SHA-256: 1ed31750591549a9e19ad17d8c3fe5982b6faa38d0361194869725c3451d3257

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