Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e4bd1c3a808f49…

MALICIOUS

PDF

77.6 KB Created: 2021-04-04 01:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6cb14941b4d0b48dba6dd977f19e61eb SHA-1: 09b5f194d2d9da2f2eedaabb1852e0b4b055de42 SHA-256: e7e4bd1c3a808f4961cc8608719d17187932cf9959737cce29c26c46590c85ef
126 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'botokaw.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying the PDF as a link farm on disposable hosting, likely used to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=house+rental+agreement+template+ireland PDF link annotation
    • https://cdn.sqhk.co/lisakopew/4PdciaR/terifefimepujetateze.pdfIn PDF document text
    • http://azorocheat6.xyz/harman_accentra_parts_manualpugpt.pdfIn PDF document text
    • http://requiredjokblog.com/96712960569wzqea.pdfIn PDF document text
    • http://suvonenexazu.mywebcommunity.org/zumodirebakakineroraw.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/jgh6Uxn/royal_caribbean_cruises_2021_europe.pdfIn PDF document text
    • http://ladowijujeto.iblogger.org/temomuliwaranike.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/english_b_ib_book_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rabetejorazi/grGChje/admission_enquiry_form_format.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/45557493919.pdfIn PDF document text
    • http://sale50.pro/how_do_i_set_up_wifi_on_my_echo_dotxjlf3.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/bixuwetexagiratupofisucwcxx.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/3fd0cf5c-3930-4780-be37-e5d17e745b85/14489174006.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/sifijaferel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8117c84b-0fc2-4dfc-8b3b-2844083da58d/pearl_jet_tub_parts.pdfIn PDF document text
    • http://tubujozuvos.epizy.com/62831136093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6634d42-322f-4268-af82-dcbd5e1b47c7/jivakeluliwedekojufole.pdfIn PDF document text
    • http://gusuwopopuwu.epizy.com/48978430240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17420f09-f269-4ae6-8cea-bb162fbce061/61844146137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbc9510-3f34-4ff0-8cbc-3cb2e4dbefb8/rama_judicial_consulta_por_numero_de_cedula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232cfbe7-b3c7-4264-9f9d-eabe2bb0b594/zedinukixanobi.pdfIn PDF document text
    • http://mesujitoz.epizy.com/risk_management_plan_template_for_small_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd5e8d8-f349-4f05-aa6a-6c702b004013/89854467409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20b17d6-58f3-44a5-8d4c-0cd3146d6c64/los_juegos_del_hambre_en_llamas_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8a93eb-f117-4e7e-97b9-686ededdcd3d/76386364965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3c1172-c207-4aa3-9241-7a7a3ff7f7f1/boards_and_beyond_step_2.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_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 5240 bytes
SHA-256: 6799e2c5187c82934932684984fdab9536aa500efe95f33f4999e0034c615f63
font_01_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 10900 bytes
SHA-256: ae528aa8be8cd57dcf9efda044093015eb2799903fe00125d3ad947478d44d1a