Malicious PDF — malware analysis report

Static analysis result for SHA-256 f447dadbdbf259eb…

MALICIOUS

PDF

78.2 KB Created: 2021-03-24 15:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 28ed1ea02b18ac6591070f99a0bfa4e7 SHA-1: e192c00bbde054db710ebe29a66a1534e038ce77 SHA-256: f447dadbdbf259eba24c6d6e9e32aa9006c14efa7bbfa8ab5a193e229416fd20
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or conduct phishing. The PDF structure and embedded content suggest it is designed to exploit user trust, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=what+are+the+dimensions+of+an+8+frame+beehive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410983/normal_600a8262523e2.pdfIn PDF document text
    • http://vinuwosozo.iblogger.org/the_apocryphon_of_james.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/august_calendar_printable_2020.pdfIn PDF document text
    • http://metazoaapc.fun/17234349438qpcke.pdfIn PDF document text
    • http://dazemuwemez.22web.org/fuzevuwurirofore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_601e867d4fa36.pdfIn PDF document text
    • http://7evenrp.ru/dovutatw9cjo.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://uploads.strikinglycdn.com/files/8e120dde-0811-4389-a023-bda07c984a63/what_is_el_conde_lucanor_about.pdfIn PDF document text
    • http://mokufapupajenap.epizy.com/tojebibakikiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d5db11-abc2-41ba-b7d8-52180e799f40/ukulele_chords_and_strumming_pattern.pdfIn PDF document text
    • http://suzifoki.myartsonline.com/logical_fallacies_handout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1915fe-7edc-4d37-b95e-25168f7a0dc3/tadigivasi.pdfIn PDF document text
    • http://votixeju.onlinewebshop.net/julelotolim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e373edbc-1987-4c5f-83c1-3a57a6942a93/28698979143.pdfIn PDF document text
    • http://nirobow.epizy.com/assistant_commandant_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/individual_income_tax_return_guide_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/jcpenney_sewing_machine_model_6915_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/3d_map_generator_terrain_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/wolfgang_puck_pressure_cooker_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb1121c-d94a-40d0-a2e8-0227bf19a705/practical_english_usage_4th_edition_download.pdfIn PDF document text
    • http://nakodazik.rf.gd/how_to_gain_mental_toughness_in_running.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5312 bytes
SHA-256: 6833d9d13960641a5f40a636612ecfb3a569ba47c16c6d07315cde9a1186a03d
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 10532 bytes
SHA-256: fb0ea4ce7eb26f4c7262616b694abc14445900628bbbef0e9195d071551cedb0
font_02_sfnt_off00011d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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