Malicious PDF — malware analysis report

Static analysis result for SHA-256 340675cfd2d6f398…

MALICIOUS

PDF

78.5 KB Created: 2021-03-25 10:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6d256cc77661ef26906790297b913c69 SHA-1: 4cea218b0ca16f66e12c901f29874b5ce900b867 SHA-256: 340675cfd2d6f3987233d05ffaf03ac13763029acd0a3a4a8b2ec3087914e9c0
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URIs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=antimoniato+de+meglumina+pdf PDF link annotation
    • http://itawegan.space/47703848098p5qe1.pdfIn PDF document text
    • http://raruranakadup.iblogger.org/papozitanif.pdfIn PDF document text
    • http://bluetea.space/how_much_does_it_cost_to_service_a_stairlifteyo3l.pdfIn PDF document text
    • http://regivag.iblogger.org/audio_to_text_converter_software_free.pdfIn PDF document text
    • http://chistohome.moscow/dugudetaberowidopakwbijy.pdfIn PDF document text
    • http://kekemubitaf.iblogger.org/eclipse_for_selenium_automation.pdfIn PDF document text
    • http://just-gopro.com/ejemplos_de_metodo_historico0wjua.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/dopugaxelelema/grimmspeed_manual_boost_controller_install.pdfIn PDF document text
    • http://nabunuwo.epizy.com/calendario_2019_para_imprimir_bonito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45f6b12-3f69-4633-8267-6787e48526cf/manual_de_gestion_de_calidad_iso_9001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae010663-8c09-43e6-b12c-8f4dc9b0e64b/56661034427.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/ocean_eyes_easy_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906aee2b-28a0-432d-a1bb-b8e84999c106/80905622811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e284776-1bf3-4800-bf0c-3ac3c033cb6c/54767426478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9713bfc2-b36a-4777-b989-d7b510904769/boiler_control_systems_engineering_gilman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d372d78-8e1f-4692-96c8-726f3d19a7ec/mugiraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a19293f-2bbd-4a0b-aaf2-151e354abbd1/74315538674.pdfIn PDF document text
    • http://jifejibi.epizy.com/spell_check_word_2016.pdfIn PDF document text
    • http://bafopivazizaxon.rf.gd/segutelowubifuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a92d74-33f0-4e53-bd97-39cd39b28c5a/42301699253.pdfIn PDF document text
    • http://bubewap.rf.gd/best_portable_battery_charger_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/pikosorogabagubikubu.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_off0000ee94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE94 5076 bytes
SHA-256: e9f30e5006433ff7cff8a285787fff7fb58d21dd4987d79579cb44fa0359ecde
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 14252 bytes
SHA-256: 0df819b18b4515c398b2adbbb79899fac5fd19a06d74ff5fdf63decade9b5b95

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