Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fad495e929ae715…

MALICIOUS

PDF

89.1 KB Created: 2021-06-12 14:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f1165b23b16ad251640e1482a053136b SHA-1: 05d0f1c5ed836abe40dd9bde65f30447d8381f9d SHA-256: 5fad495e929ae715e3006a532eb7671ad6c1ad83007ca12400b77ce67e7bc77d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a likely phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external links suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • 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://huntic.ru/pbw?utm_term=10th+science+guide+namma+kalvi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393036/normal_602100e2d4338.pdfIn PDF document text
    • https://rizipopene.weebly.com/uploads/1/3/5/3/135316145/badali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_603c7d1ccea30.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/8773319.pdfIn PDF document text
    • https://kodugeji.weebly.com/uploads/1/3/6/0/136089350/gixobowine_lurenelagami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426087/normal_60035c4fec9e2.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/1822320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5fd5f74020e8c.pdfIn PDF document text
    • https://fosizujofaz.weebly.com/uploads/1/3/4/3/134315976/0d9aeb6a587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458824/normal_5ff88483de1b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://siwunugilul.pbworks.com/w/file/fetch/144990258/wulutunadarajobuze.pdfIn PDF document text
    • http://sejiliki.pbworks.com/w/file/fetch/145170366/battle_night_cyber_squad_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c062ab-2213-4c0b-b18a-fbda013ae624/epson_l850_ink_pad_reset_software_free_download.pdfIn PDF document text
    • http://febokipup.pbworks.com/f/2003_jaguar_s_type_owners_manual_free_download.pdfIn PDF document text
    • http://zokosixaged.pbworks.com/f/95270169858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7184473d-69c2-44c8-adc3-3b2bd82c152a/reddy_heater_35_spark_plug.pdfIn PDF document text
    • http://rajejor.pbworks.com/f/how_do_i_take_indeed_assessments_again.pdfIn PDF document text
    • http://kutojeb.pbworks.com/f/44686687402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e733ed-49d1-428f-9793-8ec833997976/83119846754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430d0ff2-5485-4945-879d-aff849aa8d32/soteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff85ed0f-1e65-49e9-b526-cfcdcf25bf48/edexcel_igcse_biology_past_papers_2017_mark_scheme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82882f70-78ef-452f-9844-cac4475fed30/garena_free_fire_mod_apk_diamantes_infinitos_descargar_gratis_la_cobra.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/f/plate_tectonics_worksheet_answers.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/54859606647.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5480 bytes
SHA-256: 863a9d2b991640a72e3ef648bef86025c3e101889fc55c100245067a848b4d01
font_01_sfnt_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 16504 bytes
SHA-256: 4b606f91bcb19aecb40efcfc24bb939e100cb4720eb523d3a6af5ca4082fff22
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 11128 bytes
SHA-256: d23755f80e66804907f761d6bbfb67104e7118f925f7145a93f50be893f203e9
font_03_sfnt_off000140b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B9 16200 bytes
SHA-256: 0122748cd81c8aaef25d06666a31c613375d1a12262b2c358e7cf5fc4fa21ea9