Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7888ca57b904e1…

MALICIOUS

PDF

80.0 KB Created: 2021-04-12 06:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 87bd68d3fde2e803f32f557a442b2a13 SHA-1: 7bf4273636a664cad7645accdc0c2434713484b3 SHA-256: 1d7888ca57b904e1e08c5f613971072f320aabbbe30f47e0f7eff2d4f983f74d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple external URIs, including one pointing to 'kuzutuzo.ru' which is likely part of a phishing campaign. The PDF's structure and embedded links suggest it's designed to redirect users to potentially harmful websites, possibly to deliver further malware or steal information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=my+kenmore+gas+oven+won%2527t+heat+up PDF link annotation
    • http://widonatozeg.mypressonline.com/36107835294.pdfIn PDF document text
    • http://helpverifedbadges.com/monster_codex_boxeaf7p.pdfIn PDF document text
    • http://pressit.fun/pejobisuporu8md2q.pdfIn PDF document text
    • http://hargotel.xyz/is_ap_capstone_seminar_an_english_coursefaphk.pdfIn PDF document text
    • http://tesojopilolav.22web.org/fujovepoxiwo.pdfIn PDF document text
    • http://regvoolkim.website/maplestory_2_assassin_macro_guidez5vz9.pdfIn PDF document text
    • http://raxajifiwovoj.iblogger.org/reading_and_writing_grade_11_lm.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/past_simple_past_continuous_agenda_web.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/3315541941.pdfIn PDF document text
    • https://16dc6c2a-32e3-4a69-9eea-5b59d93654f8.filesusr.com/ugd/176c29_7ad5f7d3c936425c9f91c3b70b40e3e6.pdf?index=trueIn PDF document text
    • http://guxasimedoki.epizy.com/magisterium_vol_3.pdfIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_3b139b5c1dd04907923a4fa187ef90db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a9c829-c945-491d-85f8-67538536745e/are_saber_tooth_tigers_dangerous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b37b4af-8508-481c-86e4-e0c7935e523a/44801032511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fe472f-48d8-41ff-93a8-a10f5d2da11f/zelitusefokadofegiro.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_8e2c4cf10e7b4ffd8d0a29865c9ad805.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_0a11c7918a0b45d0a4af1cc0f4953640.pdf?index=trueIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_ed389efd63a146bb8a849d0d31fa4bbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lonozote/enhanced_school_improvement_plan_2019_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fb5d4e-88a3-43a4-a9b3-e066acae9d84/ver_serie_la_biblia_online_gratis_en_espaol_latino.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/catalogue_ikea_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/13691407915.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_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 5560 bytes
SHA-256: dccf07707d8376aef8e423ac0ad9fb11d4da449e4590c755dc1542e65a1fff4b
font_01_sfnt_off00010c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C78 11068 bytes
SHA-256: 29f6e21e581687839b745851a19cc95a7a8e12d7af99b5afe3394a76bc2696b4

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