Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d370c6e3d2f725…

MALICIOUS

PDF

79.3 KB Created: 2021-02-12 00:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ae7a098b2d05f6e745f2f73275e017b7 SHA-1: 8f004b4cbdc8a163fd881291e72198f1a67a7ab3 SHA-256: b6d370c6e3d2f725213ffd468fb70898fde7de105a80a1ea43ca638145c3322c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=rosephanye+powell+sicut+cervus PDF link annotation
    • https://cdn.sqhk.co/vibisidumes/i3igNje/vawaberewuk.pdfIn PDF document text
    • http://freud.icu/casio_g_shock_manual_47787oku9.pdfIn PDF document text
    • http://pearhaidhr.fun/adventist_church_logo_freem5fmc.pdfIn PDF document text
    • http://mobokem.iblogger.org/94928477963.pdfIn PDF document text
    • http://rokexulom.22web.org/balunga_toka_full_hd_video.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/do_re_mi_piano_sheet.pdfIn PDF document text
    • http://antonioit.fun/lenovo_tab_2_a7-3015iz0.pdfIn PDF document text
    • http://jawuzoruba.iblogger.org/lofedolirigelajokupobegiw.pdfIn PDF document text
    • http://ketousa.site/galanz_mini_fridge_gl43s5_manualbdhr2.pdfIn PDF document text
    • http://boothattendant.com/vue_framework_7_templatesqf8m.pdfIn PDF document text
    • http://ig-objectionform.com/7695885875l35m8.pdfIn PDF document text
    • http://rosephanyepowell.com/wp-content/uploads/2010/07/As_the_Deer_Pants_SSAA_Hal_Leonard_demo.mp3In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibapasugaxelo.epizy.com/rexejolonizogo.pdfIn PDF document text
    • http://wujawejibizub.epizy.com/welebiwawupeziguja.pdfIn PDF document text
    • http://fevenubonanez.rf.gd/tape_to_cd_converter_software_free.pdfIn PDF document text
    • http://vodoxaxadax.rf.gd/p_g_online_reasoning_test_answers.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/71625628235.pdfIn PDF document text
    • http://sanagubilisefuw.rf.gd/addition_and_subtraction_of_radicals_worksheets.pdfIn PDF document text
    • http://kodugexibitomo.rf.gd/latest_netflix_version_for_android_tv.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 5284 bytes
SHA-256: a47d7dd40ae1f5c97deefd75d27c5f30eedf23b09bae7e8166a5bb8557055def
font_01_sfnt_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 10588 bytes
SHA-256: 99671545720e037996ca8538013c6f2dde08518083739b263c15b4480ce08191

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