Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59065962d1af9df…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 16:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8ee192241dd833c1fe0a992110e99626 SHA-1: 61105b3a56c87e7fc1abcc337b13569135237c19 SHA-256: f59065962d1af9df35e731f1e9721b9b0585c35c4e02669cf65400b14b9c0b9e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=domain+and+kingdom+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382773/normal_60073e49ef82a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_604219c1213a5.pdfIn PDF document text
    • https://maxegexetafes.weebly.com/uploads/1/3/1/3/131379525/120649.pdfIn PDF document text
    • http://sekekejawewonul.iblogger.org/measuring_triangle_angles_with_protractor_worksheet.pdfIn PDF document text
    • http://suvoramitasowiv.22web.org/lanipak.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/321c1.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/jgdzjg2/bikijus.pdfIn PDF document text
    • http://renakuw.iblogger.org/bvb_college_bidar_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd646786ff67.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/2084641.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/jjAhhEQ/snake_game_nokia_download.pdfIn PDF document text
    • http://penibibujobufux.iblogger.org/tapegozonomuvibumikaparo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatefes.rf.gd/what_is_we_kissed_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d6a97b-b588-45fa-a7d9-2267ab436dbe/romeo_and_juliet_act_5_scene_3_test.pdfIn PDF document text
    • http://zuzidem.epizy.com/jagexalib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9eb4c81-42dc-40c4-a03e-f0c51f29b6c3/gogolipumis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2feb93f4-764f-4e54-bf7d-73c1e708ce06/silver_grey_eyeshadow_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4fadea-b61a-4004-9230-21ad2dc1c923/kenmore_front_load_washer_manual_drain.pdfIn PDF document text
    • http://wafepugi.rf.gd/82151975361.pdfIn PDF document text
    • http://godikopikigelug.epizy.com/que_es_analisis_del_discurso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1776c9ee-8588-46d0-b049-044bcb9d7928/fogoripukorobodexa.pdfIn PDF document text
    • http://rumedisevem.epizy.com/97334080338.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_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 5360 bytes
SHA-256: d3854db58ccdf15d4edc4be72f1e84f0e80171614577947e92695e3d37470f38
font_01_sfnt_off00010981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10981 11036 bytes
SHA-256: 66d97bebbb3b0c0dca1d99390ace00eb587ee14263c43360398b1393ae756d65

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