Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1969344b50465ef…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 03:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d15be75603005ae5fef3f65a99aff9c6 SHA-1: 3dffea1d8ea7c644e14df4b62b68e599003b77bd SHA-256: c1969344b50465ef08ba4a0d544f88705d53497f55f5de65aae0aff8aa95583f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting. This structure is typical of phishing or malware distribution campaigns aiming to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.vljainandco.com/userfiles/files/26640147273.pdf In PDF document text
    • http://feast.to/upd_file/xojidenadagerudamugolej.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/49086701267.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/001b20d9223b75bac2457d4cc1d32cd6/51479023864.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/xaxuvefemizubede.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/lowomevitegopaviweralan.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f8695d3daa5---gebelajajadixizedelopiz.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0qihd2ob5pb65lf76ijiqn0ee2/82716197351.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16116a46ff2537---komasapinisinitozopu.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4vrpeffcgquef2hams1eqvddvd/maxuloletowekanakexewojo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e4788637cb38fc7a11a39fe4d18ff0f0/kaxugomovigufasegetagi.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/vowanoxagozob.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/44293215153.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/sirikebuwarisikifopi.pdfIn PDF document text
    • http://fgosvo.ru/files/files/gosen.pdfIn PDF document text
    • https://www.upperhousedev7.com/ckfinder/userfiles/files/tupemizegoni.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a418ff343eb---razifop.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/gigiporaromejosugi.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/korisobasiwomep.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/zoronuzibo.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b94263d7f---dosikitiketuda.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210728061522.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/wefanotigopatemimosob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=remerciement+rapport+de+stage+3eme+pdfPDF 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_off0000d540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD540 11136 bytes
SHA-256: feb3b6900a42d05c6c568ddcdd112f6e8c856357c395518b04c8430775abc7d4
font_01_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 19164 bytes
SHA-256: aaba41e60d93945f0749789877c35b35d4e0700227853e8683d4cf27c21a1c1b
font_02_sfnt_off00011ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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