Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8bd43d3fe9f9cd…

MALICIOUS

PDF

90.9 KB Created: 2021-04-03 22:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07925aa57f255c7910563ffc74c7bc24 SHA-1: 9b510dfe7a5f94fe4881369932a5523544875362 SHA-256: 1d8bd43d3fe9f9cd81a65fab0d517f85dedbb199f90f8fdf7effef06c465edc4
136 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely used for a phishing or malware distribution campaign. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scans.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?utm_term=cuales+son+los+diferentes+tipos+de+investigacion+de+mercado
    • http://magexaxajatadog.getenjoyment.net/international_english_language_testing_system_ielts.pdf
    • http://dazolovegom.mygamesonline.org/how_to_learn_phrasal_verbs_in_english.pdf
    • http://newsportstechnology.ru/fifazijij2csk4.pdf
    • http://perfectiona.online/50812159974dbcmv.pdf
    • http://trysoda.club/87464727238inr70.pdf
    • http://plsale.pro/ejercicios_de_tablas_de_multiplicar_salteadas_para_imprimirx1ep5.pdf
    • http://rotukefune.getenjoyment.net/center_of_gravity_and_moment_of_inertia.pdf
    • http://twenty-promo2020.ru/how_to_use_aqua_tech_5-15itk3p.pdf
    • http://teachost.com/xawapoxutuxewijirofegifizo63kz.pdf
    • http://hdvideo.design/zilodoluzuxir17cnq.pdf
    • http://tehnotop.space/leadership_interview_questions_and_answers_samplebwf19.pdf
    • http://negitib.iblogger.org/hashimoto_s_thyroiditis_diet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://padusij.onlinewebshop.net/sijelagofererurowovagope.pdf
    • http://zevuketeno.rf.gd/mathematical_terms_dictionary.pdf
    • https://s3.amazonaws.com/juzowilipi/dosogafepojekawuga.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/modernist_cuisine_special_edition_baking_steel.pdf
    • https://s3.amazonaws.com/rexogeguxosix/why_is_supply_chain_management_important_in_healthcare_organization.pdf
    • http://peragodifi.epizy.com/silabus_biologi_sma_kelas_xi_ktsp.pdf
    • https://s3.amazonaws.com/viregujipowuru/4858731829.pdf
    • https://s3.amazonaws.com/nefomojuwet/social_club_apk_latest_version.pdf
    • https://s3.amazonaws.com/bezutu/63231471518.pdf
    • https://s3.amazonaws.com/wupiwupiwot/45344924178.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122fa.bin
0ca0a99fe90ddafa1428c477d51f025e0642fe010413d323890dabb704c84c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 5440 bytes
font_01_sfnt_off00013571.bin
d7ba3a1d4a3af577b0f9879adba57f16ad4ddbac02a81c624975e6b69512fffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 11836 bytes

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