Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e35e5e86271b4e…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 05:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 37a57922fd724f6cae9e1dd33a8abb20 SHA-1: df45301d9110f35caab9207fc2ad82fe0e1c0c41 SHA-256: d1e35e5e86271b4e26926f3bd066c9c814b9caf5bcbd9b23bebc7a91105ef836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many pointing to domains associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

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 https://nomylo.ru/uplcv?utm_term=best+emu+android PDF link annotation
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614029e7523ba---5582093031.pdfIn PDF document text
    • http://full814.com/upload/files/13812424158.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614082cd78d76---36801122826.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/tevewagozonus.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/rotaxawutivorafewipug.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/riderowowelitin.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/felesifanisulipurijiwo.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d94a0ba62---32653466479.pdfIn PDF document text
    • http://posuni.com/userfiles/file/lewadolu.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/30805742026.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/neluzogeliranevusoji.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d6b851b6c071c0da9c8955c635639618/43066379052.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/19075183554.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/77689287399.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/52170d9e410d9d3a8e015a791ffb9c7e/dukokuvab.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/74792639957.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/tinusoluruzazoj.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/14582630751.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/xigiwitofovapovi.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/55846939920.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/mefipesarozekivuluzasi.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/tamuvigemuzozelibinibiwa.pdfIn PDF document text
    • https://citytrafik.nu/images/file/ruvoguboxekadanubugej.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_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 17288 bytes
SHA-256: 3f28748952e01fcb08340a80f74c3b1345282e96696796a74185194de852809b
font_02_sfnt_off00011cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD7 10516 bytes
SHA-256: afc74fae27bbecab6dcd0e8e5798dc9915578d2b332b4273355ba53f4e67bbf6

Open this report in the interactive analyzer, or submit your own file for analysis.