Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae30bd9450e014a…

MALICIOUS

PDF

87.8 KB Created: 2021-03-18 23:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2266aa2aa39b2e2b51eafe294a20fd3d SHA-1: eb4049780cc96c44fe52f199c3af8e10442a9e87 SHA-256: 0ae30bd9450e014a403ff859248d440c60ba61749475f04fdee55acb37e8e8df
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL, https://nipisod.ru/wix?keyword=robin+hood+escape+hd, being a potential indicator of compromise. The PDF structure suggests it functions as a link farm, directing users to external, potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=robin+hood+escape+hd PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/Dnhcil3/transport_tycoon_online_spielen.pdfIn PDF document text
    • https://cdn.sqhk.co/lokojagivel/mIgjhei/rubirusidukinav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ff28fd08dabb.pdfIn PDF document text
    • http://cabinetsly.xyz/9312365866bjft8.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/sicEghw/king_s_raid_anime_kasel_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_604f4fb4e3054.pdfIn PDF document text
    • http://tiktokhd.design/what_supermarkets_sell_weight_watchers_foodyiw9g.pdfIn PDF document text
    • http://gekalam.22web.org/jibuvimatiwaxu.pdfIn PDF document text
    • http://gufutaca5.xyz/industrial_electronics_notes_free_downloadxgkxs.pdfIn PDF document text
    • http://sobofikikovir.22web.org/fannie_mae_loan_guidelines_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5ffe06a79af27.pdfIn PDF document text
    • http://tesar-krd.ru/epson_wf_2540_printer_head_cleaningbg6of.pdfIn PDF document text
    • http://barberking.best/read_naturally_2._5_storiesn14i9.pdfIn 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/026dd311-210d-4eb2-a050-2a14d5a519f0/diferencias_de_la_mitologia_griega_romana_y_egipcia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0674c1ab-ef19-459c-ac24-83e68074a0f7/jazubezabikanevopixagide.pdfIn PDF document text
    • http://vesevujivodekut.epizy.com/power_season_6_episode_3_toxicwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c76ab4-f5be-4344-8262-dd718420709a/how_does_facebook_portal_work_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e972b0b9-b6e6-4ae7-9552-a3b165238e5b/88467933052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3aee57d-ea82-453e-9719-59d586b2a2d5/nixizaz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B43 5180 bytes
SHA-256: 8a2adc570a2f597c5864069d81cea71f9f23c76701c335d2f7b9fbe656917584
font_01_sfnt_off00012cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 11100 bytes
SHA-256: 5598201c1d64f75be9cea0c31052c8db59a62fd7f968419f18c009ef7c483d70

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