Malicious PDF — malware analysis report

Static analysis result for SHA-256 f466d0f52925e67d…

MALICIOUS

PDF

74.5 KB Created: 2021-03-16 02:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b23519f299ccf8c9b70f9fde59d6c1d2 SHA-1: 288cf56d7c5cd09c57246f11b5069df8729d1275 SHA-256: f466d0f52925e67dd316a1bb10bb39c90599a02db74251bb4353e3ea35693159
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'gimoguvi.ru', which is flagged as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=gun+mayhem+2+unblocked+games+66 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5fdee6ff01e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60470e08e2281.pdfIn PDF document text
    • http://klyshsheff.xyz/69666473437znzrd.pdfIn PDF document text
    • http://true-board1.club/little_bill_christmas_episodekp3hf.pdfIn PDF document text
    • http://boldly-grow.com/es_4000_manualxrfgx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_6018e937aaf7f.pdfIn PDF document text
    • http://wowitaly.pro/mikezejapoboburoneohe2g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_6007b68218577.pdfIn PDF document text
    • http://tryici.xyz/meguxudesazefesi5ripk.pdfIn PDF document text
    • http://doctorzlo.com/cuanto_es_100_gramos_de_arroz_cocido_en_tazasjshou.pdfIn PDF document text
    • http://rewita.fun/ftm_bottom_surgery_futuresvge5.pdfIn PDF document text
    • http://tiurll.com/1m3hrvIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a55c655-3f20-4a41-b5eb-b63444166b6c/32714319860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08420be-bd73-4416-9a1e-185c6f27bcd2/24277544089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2061a007-6624-4be0-a495-6984435d3739/netgear_wnr2000v5_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5ef548-8ee8-4e28-bb41-4fc24e836c37/matlab_plot_marker_line_width.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7f50f2-a414-4ca4-99a5-c79fa0f8b63e/fikafusenepibezanesefafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61e85d0-39c9-4a1e-9b7c-364f210c476b/labodimotumigazevepije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5d7d13-083a-429b-9ebd-6f1156ecc067/fifty_shades_of_freed_movie_download_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169ae8df-4aca-414b-bf35-c0a19d60e234/short_horror_stories_in_english_for_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9450163b-bee0-451c-846a-b0a08256681b/g_shock_rangeman_gpr-b1000-1_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a3ea55-f7c8-4e8c-b815-81ba7137d7fa/murray_mower_deck_bearing_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24edae33-0dc7-43cf-ac7d-436b4eccc4dd/prince_of_thorns_audiobook_free_download.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41C 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000e501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE501 5880 bytes
SHA-256: c804dd07ff840ba2f370401a99cf11ab011fc18fdcdbd6ff37f9928757d900a3
font_02_sfnt_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 10352 bytes
SHA-256: e248ac9426683ebdf138cd0dfbc03fb949556b40db8383ee72bcf505ba56a2a9