Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc169df2ddc2599…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 05:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1a174765ae433d9912bf724f75c6e336 SHA-1: 3e2f9eeb879056cb5509e25a24763203a952fb57 SHA-256: 5fc169df2ddc2599a29af58ad30277d5951e835edecee3aec3bf28fdcee625d8
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://inwebjor.ru/uplcv?utm_term=how+to+disable+ok+google+on+android PDF link annotation
    • http://eia-edu.com/userfiles/file/1748612111.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/40807827985.pdfIn PDF document text
    • http://rvhifi.cz/files/file/31777152691.pdfIn PDF document text
    • http://nguyenphat.com/public/default/ckeditor/files/fokawomiluzulukosixefapuz.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/41824781507.pdfIn PDF document text
    • https://tipresentoio.it/images/file/xuwobowanivosemubara.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161410fe3bd571---tiwuxu.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/11416244389.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/5774507179.pdfIn PDF document text
    • http://yztools.com/images/upload/File/nerirovixuxo.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/mogumowipokimasubiluwop.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/15898941246.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f77440d2b0---56537932338.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/fokamelisosura.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/91945062900.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e59b70790f---wojeputogutanoravupamota.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210909_C686D1FDD4495B40.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/zusixopujemotewit.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/26922933675.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/mizuxudanapewaki.pdfIn PDF document text
    • https://airxps.com/userfiles/files/patumawefifoxikilibuf.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/babaxilisuduteler.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/51634186962.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142525e07d50---xakujaj.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_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10732 bytes
SHA-256: a5c924c4f6680b327aef8afb70635ca9ccc8dc1082425925e271453ed52d96f8
font_01_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 17644 bytes
SHA-256: 697c9f3117226f099a1dfedab23b2fd73961dfffb929eba6f615a3bc46d85e37
font_02_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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