Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2b0fecfe293f7e…

MALICIOUS

PDF

94.5 KB Created: 2021-03-17 19:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b261b079cf97b79dfface1228e55e9eb SHA-1: b85fee69317dcb8e6e79121b0db718af5be04866 SHA-256: 9d2b0fecfe293f7e61294dc525b1bf2c12a3f293c7b43a6cc2d5a56d6f83daac
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one pointing to 'nipisod.ru' which is flagged as an external URI and associated with a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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=r717+refrigerant+msds PDF link annotation
    • http://item-get.top/1732327736tr4jx.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/tintin_au_congo_download.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/json_tutorial_for_dummieso7mx4.pdfIn PDF document text
    • http://ratedewu.scienceontheweb.net/xemojukirimafutozavigeman.pdfIn PDF document text
    • http://amorexpo.com/guilherme_de_souza_nucci_codigo_penal_comentado_downloadhd0dl.pdfIn PDF document text
    • http://1offpark.xyz/79777326690sd9ez.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/10027556149.pdfIn PDF document text
    • http://samettemiz.xyz/peduwukklvm3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/government_interview_questions_and_answers.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_3b7e3e6e94774b91a7b3c51acc3fe063.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/mobile_legends_adventure_mod_apk_platinmods.pdfIn PDF document text
    • http://repenebaroregom.rf.gd/irish_daily_mail_crossword_answers.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_91c729cb9f6f424894826420d7ffadcd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/brother_tn_420_replace_toner_error.pdfIn PDF document text
    • http://muxomak.epizy.com/18943308611.pdfIn PDF document text
    • http://susugafof.epizy.com/toguzudawetutafidunog.pdfIn PDF document text
    • http://jeragapa.epizy.com/aagadu_movie_comedy_scenes_free.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_2cd84f96630a483492c3b3fa9290b06e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/91293445309.pdfIn PDF document text
    • http://gefuxuxoj.epizy.com/kutosowaxizolufepiwamogi.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_c5cb6fecfea9460d978e47bff81f0c1c.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_91c2729156614770a3a58f419c1839ef.pdf?index=trueIn PDF document text
    • http://wumugajus.onlinewebshop.net/cheyenne_class_starship.pdfIn PDF document text
    • https://afed16a6-407c-4fb6-a58d-fff347359a8c.filesusr.com/ugd/c34eac_c9f45ae81d024ae39e78309f2fa4e50c.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_36c128f0fe504408955b8beab4b3ccce.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_af8d828480b6446cb6ea75929626558d.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 5012 bytes
SHA-256: 75032b880cc2feb89bee4d3756a568771503ff330bb69805d05eef3a161c9e86
font_01_sfnt_off000139a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A3 10760 bytes
SHA-256: 8fee4515f0d3340f7340d611f83ae7cccd205e232cf991ca6b40cc54bffd60aa
font_02_sfnt_off00015e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E85 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361