Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec97632f2faa01a…

MALICIOUS

PDF

72.2 KB Created: 2021-03-22 01:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0b9c8c3692ae575b4e2096f95cdf3b1e SHA-1: 730c12e2816beb2e9737e34762af4a3626c7d67f SHA-256: 6ec97632f2faa01aba1d5e36150686f759079bb1af57875052d85d21e237d1f0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a link farm. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful sites, likely for phishing or malware delivery.

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://midufefew.ru/123?utm_term=carousel+layout+android+studio PDF link annotation
    • http://didazema.mypressonline.com/free_translation_books.pdfIn PDF document text
    • http://heretythere.site/sofa_set_online_shopping_kerala2e7vb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_5fd640f6e4ecb.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/3535654.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/2663012.pdfIn PDF document text
    • https://sapefita.weebly.com/uploads/1/3/0/7/130776655/9113666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_5fccdf5955e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484363/normal_6018e84db6be4.pdfIn PDF document text
    • http://begemotiks.space/perimeter_and_area_worksheets_kutaxv0hu.pdfIn PDF document text
    • http://idealicaitaly.site/icsee_for_pc_windowszxu0l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5fe4005a11a56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406223/normal_5fedf12870e13.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/20722981102.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/77039509099.pdfIn PDF document text
    • http://podipotekoi.ru/killer_keos_skimpy_cbbe_v2-v3_armor_replacer_ssefxsr6.pdfIn PDF document text
    • http://help-copyrighteamservice.com/35071469386mo8cj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/11101503573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f6c099-e2ec-4c66-98ba-faf575610cf8/beatles_sheet_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4434eb20-0fbc-4c56-87dc-3eb2c1b5117b/datamax_dmx-m-4208_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eba6e9-4d60-4c9f-bfb6-a81debd90496/jaxilowevakas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2014c446-e80c-43a3-8b63-239405137dcb/24486752891.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_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 4824 bytes
SHA-256: cb2e627b03edc6eedb2f7348295b4fbd6247e5b35f6ccad3f515327e6b2a67d2
font_01_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 10984 bytes
SHA-256: 1e3b904e3b1d1bd88f0e46beb83649f62ecebf314bb4d1e7a0a6ea5fdcb52fe7

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